diff --git a/Assets/_DDD/_Scripts/GameController/GameController.cs b/Assets/_DDD/_Scripts/GameController/GameController.cs
index e55d54ab9..2b22a55cd 100644
--- a/Assets/_DDD/_Scripts/GameController/GameController.cs
+++ b/Assets/_DDD/_Scripts/GameController/GameController.cs
@@ -10,22 +10,22 @@ public class GameController : Singleton<GameController>, IManager, IGameFlowHand
     {
         [SerializeField] private AssetReference _gameData;
         
-        public GameData GameData { get; private set; }
-        public GameState GameState { get; private set; }       
+        public GameData GetGameData() => GameData.Instance;
+        public GameState GetGameState() => GameState.Instance;       
         
         private List<FlowController> _gameFlowControllers = new();
         private static readonly List<Type> GameFlowControllerTypes = new();
 
         public void PreInit()
         {
-            LoadOrCreateRestaurantState();
+            CreateGameState();
             RegisterFlowHandler();
         }
 
         public async Task Init()
         {
             await LoadData();
-            await GameData.LoadData();
+            await GetGameData().LoadData();
             await InitializeAllFlowControllers();
         }
 
@@ -33,10 +33,9 @@ public void PostInit()
         {
         }
 
-        private void LoadOrCreateRestaurantState()
+        private void CreateGameState()
         {
-            // TODO : Load states from saved files. if none, create them.
-            GameState = ScriptableObject.CreateInstance<GameState>();
+            GameState.CreateScriptSingleton();
         }
 
         private void RegisterFlowHandler()
@@ -49,7 +48,7 @@ private async Task InitializeAllFlowControllers()
             // Create controllers and initialize them
             foreach (var gameFlowControllerType in GameFlowControllerTypes)
             {
-                // create new controllers from restaurantFlowControllerType
+                // create new controllers from gameFlowControllerType
                 var newController = ScriptableObject.CreateInstance(gameFlowControllerType);
                 var newFlowController = newController as FlowController;
                 _gameFlowControllers.Add(newFlowController);
@@ -64,14 +63,6 @@ private async Task InitializeAllFlowControllers()
 
         private async Task LoadData()
         {
-            var gameDataHandle = _gameData.LoadAssetAsync<GameData>();
-
-            await gameDataHandle.Task;
-
-            GameData = gameDataHandle.Result;
-
-            Debug.Assert(GameData != null, "GameData is null");
-
             await Task.CompletedTask;
         }
 
diff --git a/Assets/_DDD/_Scripts/GameData/GameData.cs b/Assets/_DDD/_Scripts/GameData/GameData.cs
index f6bc5666c..e25d84940 100644
--- a/Assets/_DDD/_Scripts/GameData/GameData.cs
+++ b/Assets/_DDD/_Scripts/GameData/GameData.cs
@@ -5,7 +5,7 @@
 namespace DDD
 {
     [CreateAssetMenu(fileName = "GameData", menuName = "GameData/GameData")]
-    public class GameData : ScriptableObject
+    public class GameData : ScriptSingleton<GameData>
     {
         [SerializeField] private AssetReference _gameLocalizationData;
 
diff --git a/Assets/_DDD/_Scripts/GameFramework/Localization/LocalizationManager.cs b/Assets/_DDD/_Scripts/GameFramework/Localization/LocalizationManager.cs
index 5d04adfdd..e43ed2d8a 100644
--- a/Assets/_DDD/_Scripts/GameFramework/Localization/LocalizationManager.cs
+++ b/Assets/_DDD/_Scripts/GameFramework/Localization/LocalizationManager.cs
@@ -97,7 +97,7 @@ public string GetString(string key)
             var entryRef = key;
             var locale = LocalizationSettings.SelectedLocale;
             
-            VariablesGroupAsset variables = GameController.Instance.GameData.LocalizationData.SmartStringVariableGroup;
+            VariablesGroupAsset variables = GameData.Instance.LocalizationData.SmartStringVariableGroup;
             if (variables != null)
             {
                 _singleArgBuffer.Clear();
diff --git a/Assets/_DDD/_Scripts/GameFramework/Localization/SmartStringVariables.cs b/Assets/_DDD/_Scripts/GameFramework/Localization/SmartStringVariables.cs
index 8234cca30..2ee3199b6 100644
--- a/Assets/_DDD/_Scripts/GameFramework/Localization/SmartStringVariables.cs
+++ b/Assets/_DDD/_Scripts/GameFramework/Localization/SmartStringVariables.cs
@@ -50,8 +50,8 @@ public void PreInit() { }
 
         public async Task Init()
         {
-            var gameLevelStateSo = GameController.Instance.GameState.LevelState;
-            var restaurantStateSo = RestaurantController.Instance.RestaurantState.ManagementState;
+            var gameLevelStateSo = GameState.Instance.LevelState;
+            var restaurantStateSo = RestaurantState.Instance.ManagementState;
 
             // 예시: day 초기 세팅 (없으면 생성, 타입 다르면 교체)
             Set(_smartStringKeys[smartStringKey.Day], gameLevelStateSo.Level);
@@ -71,7 +71,7 @@ public void PostInit()
             EventBus.Register<SmartVariablesDirtyEvent>(this);
         }
 
-        private RestaurantManagementState GetRestaurantState() => RestaurantController.Instance.RestaurantState.ManagementState;
+        private RestaurantManagementState GetRestaurantState() => RestaurantState.Instance.ManagementState;
 
         public void Invoke(SmartVariablesDirtyEvent evt)
         {
@@ -113,7 +113,7 @@ public void RefreshChecklistTargets()
 
         public void RefreshDay()
         {
-            var gameLevelStateSo = GameController.Instance.GameState.LevelState;
+            var gameLevelStateSo = GameState.Instance.LevelState;
             Set(_smartStringKeys[smartStringKey.Day], gameLevelStateSo.Level);
         }
 
@@ -179,7 +179,7 @@ public void SetEnum<TEnum>(string key, TEnum value) where TEnum : struct
                 return null;
             }
 
-            var smartStringVariableGroup = GameController.Instance.GameData.LocalizationData.SmartStringVariableGroup;
+            var smartStringVariableGroup = GameData.Instance.LocalizationData.SmartStringVariableGroup;
 
             if (smartStringVariableGroup.TryGetValue(key, out var existing))
             {
diff --git a/Assets/_DDD/_Scripts/GameState/GameState.cs b/Assets/_DDD/_Scripts/GameState/GameState.cs
index e87610fc5..70dfbc792 100644
--- a/Assets/_DDD/_Scripts/GameState/GameState.cs
+++ b/Assets/_DDD/_Scripts/GameState/GameState.cs
@@ -3,7 +3,7 @@
 
 namespace DDD
 {
-    public class GameState : ScriptableObject
+    public class GameState : ScriptSingleton<GameState>
     {
         [SerializeField] private AssetReference _gameLevelState;
         
diff --git a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/ChecklistView.cs b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/ChecklistView.cs
index 5ebdb649c..5e079848f 100644
--- a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/ChecklistView.cs
+++ b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/ChecklistView.cs
@@ -29,7 +29,7 @@ public class ChecklistView : MonoBehaviour, IEventHandler<TodayMenuAddedEvent>,
 
         public void Initalize()
         {
-            restaurantManagementStateSo = RestaurantController.Instance.RestaurantState.ManagementState;
+            restaurantManagementStateSo = RestaurantState.Instance.ManagementState;
 
             _checklistDatas = new List<ChecklistData>(3);
             _checklistDatas = GetComponentsInChildren<ChecklistData>().ToList();
diff --git a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/InventoryUi/InventorySlotUiStrategy.cs b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/InventoryUi/InventorySlotUiStrategy.cs
index e179eb69a..03aa32396 100644
--- a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/InventoryUi/InventorySlotUiStrategy.cs
+++ b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/InventoryUi/InventorySlotUiStrategy.cs
@@ -40,7 +40,7 @@ public void Setup(ItemSlotUi ui, ItemViewModel model)
 
         public RuntimeAnimatorController GetAnimatorController()
         {
-            return RestaurantController.Instance.RestaurantData.ManagementData.InventorySlotUiAnimatorController;
+            return RestaurantData.Instance.ManagementData.InventorySlotUiAnimatorController;
         }
 
         public void OnInventoryChanged(ItemSlotUi ui)
diff --git a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/InventoryUi/InventoryView.cs b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/InventoryUi/InventoryView.cs
index 13b7c0912..5217129a9 100644
--- a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/InventoryUi/InventoryView.cs
+++ b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/InventoryUi/InventoryView.cs
@@ -38,8 +38,8 @@ private void OnDisable()
 
         public void Initialize()
         {
-            restaurantManagementStateSo = RestaurantController.Instance.RestaurantState.ManagementState;
-            restaurantManagementDataSo = RestaurantController.Instance.RestaurantData.ManagementData;
+            restaurantManagementStateSo = RestaurantState.Instance.ManagementState;
+            restaurantManagementDataSo = RestaurantData.Instance.ManagementData;
             Debug.Assert(restaurantManagementDataSo != null, "_todayMenuDataSo != null");
 
             Clear();
diff --git a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/ItemDetailView.cs b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/ItemDetailView.cs
index dcc9dfa26..5cd0a253a 100644
--- a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/ItemDetailView.cs
+++ b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/ItemDetailView.cs
@@ -49,7 +49,7 @@ private void OnDisable()
 
         public void Initialize()
         {
-            restaurantManagementDataSo = RestaurantController.Instance.RestaurantData.ManagementData;
+            restaurantManagementDataSo = RestaurantData.Instance.ManagementData;
         }
 
         public void Invoke(ItemSlotSelectedEvent evt)
diff --git a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/RestaurantManagementUi.cs b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/RestaurantManagementUi.cs
index 28977f600..573a78fe6 100644
--- a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/RestaurantManagementUi.cs
+++ b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/RestaurantManagementUi.cs
@@ -60,7 +60,7 @@ private void UpdateHoldProgress()
 
         private void ProcessCompleteBatchAction()
         {
-            if (RestaurantController.Instance.RestaurantState.ManagementState.GetChecklistStates().Any(state => state == false))
+            if (RestaurantState.Instance.ManagementState.GetChecklistStates().Any(state => state == false))
             {
                 ShowChecklistFailedPopup();
             }
diff --git a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayMenuUi/TodayMenuInteractorStrategy.cs b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayMenuUi/TodayMenuInteractorStrategy.cs
index 32ff38f3d..5a3987a33 100644
--- a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayMenuUi/TodayMenuInteractorStrategy.cs
+++ b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayMenuUi/TodayMenuInteractorStrategy.cs
@@ -10,7 +10,7 @@ public void OnAdded(ItemSlotUi itemSlotUi)
             
             if (inventorySlotUiStrategy.CanCrafting(itemSlotUi))
             {
-                RestaurantController.Instance.RestaurantState.ManagementState.TryAddTodayMenu(itemSlotUi.Model);
+                RestaurantState.Instance.ManagementState.TryAddTodayMenu(itemSlotUi.Model);
             }
             else
             {
@@ -25,7 +25,7 @@ public void OnRemoved(ItemSlotUi itemSlotUi)
         {
             if (itemSlotUi.Strategy is InventorySlotUiStrategy) return;
             
-            RestaurantController.Instance.RestaurantState.ManagementState.TryRemoveTodayMenu(itemSlotUi.Model);
+            RestaurantState.Instance.ManagementState.TryRemoveTodayMenu(itemSlotUi.Model);
         }
     }
 }
\ No newline at end of file
diff --git a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayMenuUi/TodayMenuSlotUiStrategy.cs b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayMenuUi/TodayMenuSlotUiStrategy.cs
index 47a9bf655..3403b5020 100644
--- a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayMenuUi/TodayMenuSlotUiStrategy.cs
+++ b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayMenuUi/TodayMenuSlotUiStrategy.cs
@@ -35,7 +35,7 @@ public void Setup(ItemSlotUi ui, ItemViewModel model)
             }
             
             string markSpriteKey = null;
-            if (RestaurantController.Instance.RestaurantState.ManagementState.IsCookwareMatched(ui.Model.Id))
+            if (RestaurantState.Instance.ManagementState.IsCookwareMatched(ui.Model.Id))
             {
                 markSpriteKey = SpriteConstants.CheckYesSpriteKey;
             }
@@ -51,7 +51,7 @@ public void Setup(ItemSlotUi ui, ItemViewModel model)
 
         public RuntimeAnimatorController GetAnimatorController()
         {
-            return RestaurantController.Instance.RestaurantData.ManagementData.TodayMenuSlotUiAnimatorController;
+            return RestaurantData.Instance.ManagementData.TodayMenuSlotUiAnimatorController;
         }
     }
 }
\ No newline at end of file
diff --git a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayMenuUi/TodayMenuView.cs b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayMenuUi/TodayMenuView.cs
index cb08f7142..977cf8ba2 100644
--- a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayMenuUi/TodayMenuView.cs
+++ b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayMenuUi/TodayMenuView.cs
@@ -23,8 +23,8 @@ private void OnDestroy()
 
         public void Initialize()
         {
-            restaurantManagementStateSo = RestaurantController.Instance.RestaurantState.ManagementState;
-            restaurantManagementDataSo = RestaurantController.Instance.RestaurantData.ManagementData;
+            restaurantManagementStateSo = RestaurantState.Instance.ManagementState;
+            restaurantManagementDataSo = RestaurantData.Instance.ManagementData;
             
             foreach (Transform child in _todayFoodContent)
             {
diff --git a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayRestaurantStateUi/TodayCookwareInteractorStrategy.cs b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayRestaurantStateUi/TodayCookwareInteractorStrategy.cs
index 443aef47a..9d18d85b9 100644
--- a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayRestaurantStateUi/TodayCookwareInteractorStrategy.cs
+++ b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayRestaurantStateUi/TodayCookwareInteractorStrategy.cs
@@ -10,7 +10,7 @@ public void OnAdded(ItemSlotUi itemSlotUi)
             
             if (inventorySlotUiStrategy.CanCrafting(itemSlotUi))
             {
-                RestaurantController.Instance.RestaurantState.ManagementState.TryAddTodayCookware(itemSlotUi.Model);
+                RestaurantState.Instance.ManagementState.TryAddTodayCookware(itemSlotUi.Model);
             }
             else
             {
@@ -25,7 +25,7 @@ public void OnRemoved(ItemSlotUi itemSlotUi)
         {
             if (itemSlotUi.Strategy is InventorySlotUiStrategy) return;
             
-            RestaurantController.Instance.RestaurantState.ManagementState.TryRemoveTodayCookware(itemSlotUi.Model);
+            RestaurantState.Instance.ManagementState.TryRemoveTodayCookware(itemSlotUi.Model);
         }
     }
 }
\ No newline at end of file
diff --git a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayRestaurantStateUi/TodayCookwareSlotUiStrategy.cs b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayRestaurantStateUi/TodayCookwareSlotUiStrategy.cs
index 92830d63c..fff5e0830 100644
--- a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayRestaurantStateUi/TodayCookwareSlotUiStrategy.cs
+++ b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayRestaurantStateUi/TodayCookwareSlotUiStrategy.cs
@@ -18,7 +18,7 @@ public void Setup(ItemSlotUi ui, ItemViewModel model)
             }
             
             string markSpriteKey = null;
-            if (RestaurantController.Instance.RestaurantState.ManagementState.IsTodayMenuMatched(ui.Model.Id))
+            if (RestaurantState.Instance.ManagementState.IsTodayMenuMatched(ui.Model.Id))
             {
                 markSpriteKey = SpriteConstants.CheckYesSpriteKey;
             }
@@ -34,7 +34,7 @@ public void Setup(ItemSlotUi ui, ItemViewModel model)
 
         public RuntimeAnimatorController GetAnimatorController()
         {
-            return RestaurantController.Instance.RestaurantData.ManagementData.TodayMenuSlotUiAnimatorController;
+            return RestaurantData.Instance.ManagementData.TodayMenuSlotUiAnimatorController;
         }
     }
 }
\ No newline at end of file
diff --git a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayRestaurantStateUi/TodayRestaurantStateView.cs b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayRestaurantStateUi/TodayRestaurantStateView.cs
index c97db971e..55ec2df61 100644
--- a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayRestaurantStateUi/TodayRestaurantStateView.cs
+++ b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayRestaurantStateUi/TodayRestaurantStateView.cs
@@ -23,8 +23,8 @@ private void OnDestroy()
         
         public void Initialize()
         {
-            restaurantManagementStateSo = RestaurantController.Instance.RestaurantState.ManagementState;
-            restaurantManagementDataSo = RestaurantController.Instance.RestaurantData.ManagementData;
+            restaurantManagementStateSo = RestaurantState.Instance.ManagementState;
+            restaurantManagementDataSo = RestaurantData.Instance.ManagementData;
             
             foreach (Transform child in _todayWorkerContent)
             {
diff --git a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayRestaurantStateUi/TodayWorkerSlotUiStrategy.cs b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayRestaurantStateUi/TodayWorkerSlotUiStrategy.cs
index 82a01cb85..f403f9aef 100644
--- a/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayRestaurantStateUi/TodayWorkerSlotUiStrategy.cs
+++ b/Assets/_DDD/_Scripts/GameUi/PopupUi/RestaurantManagementUi/TodayRestaurantStateUi/TodayWorkerSlotUiStrategy.cs
@@ -26,7 +26,7 @@ public void Setup(ItemSlotUi ui, ItemViewModel model)
 
         public RuntimeAnimatorController GetAnimatorController()
         {
-            return RestaurantController.Instance.RestaurantData.ManagementData.TodayMenuSlotUiAnimatorController;
+            return RestaurantData.Instance.ManagementData.TodayMenuSlotUiAnimatorController;
         }
     }
 }
\ No newline at end of file
diff --git a/Assets/_DDD/_Scripts/RestaurantCharacter/Player/RestaurantPlayerInput.cs b/Assets/_DDD/_Scripts/RestaurantCharacter/Player/RestaurantPlayerInput.cs
index 4d5160068..dc22b7dcb 100644
--- a/Assets/_DDD/_Scripts/RestaurantCharacter/Player/RestaurantPlayerInput.cs
+++ b/Assets/_DDD/_Scripts/RestaurantCharacter/Player/RestaurantPlayerInput.cs
@@ -9,7 +9,7 @@ public class RestaurantPlayerInput : MonoBehaviour
         
         private void Start()
         {
-            _playerDataSo = RestaurantController.Instance.RestaurantData.PlayerData;
+            _playerDataSo = RestaurantData.Instance.PlayerData;
             _playerDataSo.OpenManagementUiAction = InputManager.Instance.GetAction(InputActionMaps.Restaurant, nameof(RestaurantActions.OpenManagementUi));
             
             _playerDataSo.OpenManagementUiAction.performed += OnOpenManagementUi;
diff --git a/Assets/_DDD/_Scripts/RestaurantCharacter/Player/RestaurantPlayerInteraction.cs b/Assets/_DDD/_Scripts/RestaurantCharacter/Player/RestaurantPlayerInteraction.cs
index 7ea8e0740..8f648cef9 100644
--- a/Assets/_DDD/_Scripts/RestaurantCharacter/Player/RestaurantPlayerInteraction.cs
+++ b/Assets/_DDD/_Scripts/RestaurantCharacter/Player/RestaurantPlayerInteraction.cs
@@ -17,7 +17,7 @@ protected override void Start()
 
         private Task Initialize()
         {
-            _restaurantPlayerDataSo = RestaurantController.Instance.RestaurantData.PlayerData;
+            _restaurantPlayerDataSo = RestaurantData.Instance.PlayerData;
             Debug.Assert(_restaurantPlayerDataSo != null, "_restaurantPlayerDataSo is null");
 
             _restaurantPlayerDataSo!.InteractAction = InputManager.Instance.GetAction(InputActionMaps.Restaurant, nameof(RestaurantActions.Interact));
diff --git a/Assets/_DDD/_Scripts/RestaurantCharacter/Player/RestaurantPlayerMovement.cs b/Assets/_DDD/_Scripts/RestaurantCharacter/Player/RestaurantPlayerMovement.cs
index 578d6779c..f564d2ae6 100644
--- a/Assets/_DDD/_Scripts/RestaurantCharacter/Player/RestaurantPlayerMovement.cs
+++ b/Assets/_DDD/_Scripts/RestaurantCharacter/Player/RestaurantPlayerMovement.cs
@@ -81,7 +81,7 @@ private System.Threading.Tasks.Task InitializePlayerData()
         {
             try
             {
-                _playerDataSo = RestaurantController.Instance.RestaurantData.PlayerData;
+                _playerDataSo = RestaurantData.Instance.PlayerData;
                 SubscribeToInputEvents();
                 _isInitialized = true;
             }
diff --git a/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/RestaurantEnvironmentController.cs b/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/RestaurantEnvironmentController.cs
index 609f59a57..b45a751c0 100644
--- a/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/RestaurantEnvironmentController.cs
+++ b/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/RestaurantEnvironmentController.cs
@@ -13,7 +13,7 @@ public override Task InitializeController()
 
         public override Task InitializeState()
         {
-            _environmentState = RestaurantController.Instance.RestaurantState.EnvironmentState;
+            _environmentState = RestaurantState.Instance.EnvironmentState;
             return Task.CompletedTask;
         }
 
diff --git a/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/RestaurantManagementController.cs b/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/RestaurantManagementController.cs
index e16b28c25..0237687fd 100644
--- a/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/RestaurantManagementController.cs
+++ b/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/RestaurantManagementController.cs
@@ -13,7 +13,7 @@ public override Task InitializeController()
         public override Task InitializeState()
         {
             // Load default asset
-            RestaurantController.Instance.RestaurantState.ManagementState.InitializeReadyForRestaurant();
+            RestaurantState.Instance.ManagementState.InitializeReadyForRestaurant();
             return Task.CompletedTask;
         }
 
diff --git a/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/RestaurantRunController.cs b/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/RestaurantRunController.cs
index ca7338ba9..5b48a8551 100644
--- a/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/RestaurantRunController.cs
+++ b/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/RestaurantRunController.cs
@@ -8,14 +8,13 @@ public class RestaurantRunController : FlowController
         RestaurantCustomerState _restaurantCustomerStateSo;
         public override Task InitializeController()
         {
-            _restaurantCustomerStateSo = RestaurantController.Instance.RestaurantState.CustomerState;
-            return Task.CompletedTask;           
+            _restaurantCustomerStateSo = RestaurantState.Instance.CustomerState;
+            return Task.CompletedTask;
         }
 
         public override Task InitializeState()
         {
             return Task.CompletedTask;
-            
         }
 
         public override async Task OnReadyNewFlow(GameFlowState newFlowState)
diff --git a/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/Tasks/CreateRestaurantEnvironment.cs b/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/Tasks/CreateRestaurantEnvironment.cs
index e61d338a5..e8372b8ad 100644
--- a/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/Tasks/CreateRestaurantEnvironment.cs
+++ b/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/Tasks/CreateRestaurantEnvironment.cs
@@ -15,7 +15,7 @@ public override Task RunFlowTask()
         {
             // TODO : Base prefab from EnvironmentDataSo
             
-            var props = RestaurantController.Instance.RestaurantState.EnvironmentState.Props;
+            var props = RestaurantState.Instance.EnvironmentState.Props;
             foreach (var prop in props)
             {
                 // TODO : Instantiate and Initialize
diff --git a/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/Tasks/CreateRestaurantPlayer.cs b/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/Tasks/CreateRestaurantPlayer.cs
index fbee756b5..f5ac043ea 100644
--- a/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/Tasks/CreateRestaurantPlayer.cs
+++ b/Assets/_DDD/_Scripts/RestaurantController/Conrtollers/Tasks/CreateRestaurantPlayer.cs
@@ -20,7 +20,7 @@ public override Task RunFlowTask()
                 return Task.CompletedTask;
             }
 
-            var playerPrefab = RestaurantController.Instance.RestaurantData.PlayerData.PlayerPrefab;
+            var playerPrefab = RestaurantData.Instance.PlayerData.PlayerPrefab;
             if (playerPrefab == null)
             {
                 Debug.LogError("PlayerPrefab이 설정되지 않았습니다!");
diff --git a/Assets/_DDD/_Scripts/RestaurantController/RestaurantController.cs b/Assets/_DDD/_Scripts/RestaurantController/RestaurantController.cs
index e3d82a1a2..0069fff33 100644
--- a/Assets/_DDD/_Scripts/RestaurantController/RestaurantController.cs
+++ b/Assets/_DDD/_Scripts/RestaurantController/RestaurantController.cs
@@ -10,8 +10,8 @@ public class RestaurantController : Singleton<RestaurantController>, IManager, I
     {
         [SerializeField] private AssetReference _restaurantData;
 
-        public RestaurantData RestaurantData { get; private set; }
-        public RestaurantState RestaurantState { get; private set; }
+        public RestaurantData GetRestaurantData() => RestaurantData.Instance;
+        public RestaurantState GetRestaurantState() => RestaurantState.Instance;
 
         private List<FlowController> _restaurantFlowControllers = new();
 
@@ -27,14 +27,14 @@ public class RestaurantController : Singleton<RestaurantController>, IManager, I
 
         public void PreInit()
         {
-            LoadOrCreateRestaurantState();
+            CreateRestaurantState();
             RegisterFlowHandler();
         }
 
         public async Task Init()
         {
             await LoadData();
-            await RestaurantData.LoadData();
+            await GetRestaurantData().LoadData();
             await InitializeAllFlowControllers();
         }
 
@@ -42,10 +42,9 @@ public void PostInit()
         {
         }
 
-        private void LoadOrCreateRestaurantState()
+        private void CreateRestaurantState()
         {
-            // TODO : Load states from saved files. if none, create them.
-            RestaurantState = ScriptableObject.CreateInstance<RestaurantState>();
+            RestaurantState.CreateScriptSingleton();
         }
 
         private void RegisterFlowHandler()
@@ -73,13 +72,7 @@ private async Task InitializeAllFlowControllers()
 
         private async Task LoadData()
         {
-            var restaurantDataHandle = _restaurantData.LoadAssetAsync<RestaurantData>();
-
-            await restaurantDataHandle.Task;
-
-            RestaurantData = restaurantDataHandle.Result;
-
-            Debug.Assert(RestaurantData != null, "RestaurantData is null");
+            await Task.CompletedTask;
         }
 
         public async Task OnReadyNewFlow(GameFlowState newFlowState)
diff --git a/Assets/_DDD/_Scripts/RestaurantData/RestaurantData.cs b/Assets/_DDD/_Scripts/RestaurantData/RestaurantData.cs
index c87be817e..3f8892c30 100644
--- a/Assets/_DDD/_Scripts/RestaurantData/RestaurantData.cs
+++ b/Assets/_DDD/_Scripts/RestaurantData/RestaurantData.cs
@@ -5,7 +5,7 @@
 namespace DDD
 {
     [CreateAssetMenu(fileName = "RestaurantData", menuName = "RestaurantData/RestaurantData", order = 0)]
-    public class RestaurantData : ScriptableObject
+    public class RestaurantData : ScriptSingleton<RestaurantData>
     {
         [SerializeField] private AssetReference _restaurantPlayerData;
         [SerializeField] private AssetReference _restaurantManagementData;
diff --git a/Assets/_DDD/_Scripts/RestaurantEvent/Solvers/RestaurantOpenEventSolver.cs b/Assets/_DDD/_Scripts/RestaurantEvent/Solvers/RestaurantOpenEventSolver.cs
index ec7aaa66d..516d49444 100644
--- a/Assets/_DDD/_Scripts/RestaurantEvent/Solvers/RestaurantOpenEventSolver.cs
+++ b/Assets/_DDD/_Scripts/RestaurantEvent/Solvers/RestaurantOpenEventSolver.cs
@@ -15,7 +15,7 @@ public bool ExecuteInteraction(IInteractor interactor, IInteractable interactabl
 
         private RestaurantManagementState GetManagementState()
         {
-            return RestaurantController.Instance.RestaurantState.ManagementState;
+            return RestaurantState.Instance.ManagementState;
         }
 
         public bool CanExecuteInteraction(IInteractor interactor = null, IInteractable interactable = null, ScriptableObject payloadSo = null)
diff --git a/Assets/_DDD/_Scripts/RestaurantState/FlowStates/RestaurantCustomerState.cs b/Assets/_DDD/_Scripts/RestaurantState/FlowStates/RestaurantCustomerState.cs
index 9e9f1ca13..26daa3568 100644
--- a/Assets/_DDD/_Scripts/RestaurantState/FlowStates/RestaurantCustomerState.cs
+++ b/Assets/_DDD/_Scripts/RestaurantState/FlowStates/RestaurantCustomerState.cs
@@ -51,7 +51,7 @@ private async Task InitializeRunRestaurant()
         {
             _iCustomerFactory = new CustomerFactory();
 
-            var currentGameLevel = GameController.Instance.GameState.LevelState.Level;
+            var currentGameLevel = GameState.Instance.LevelState.Level;
             if (_levelDataSo == null)
             {
                 _levelDataSo = DataManager.Instance.GetDataSo<LevelDataSo>();
diff --git a/Assets/_DDD/_Scripts/RestaurantState/FlowStates/RestaurantManagementState.cs b/Assets/_DDD/_Scripts/RestaurantState/FlowStates/RestaurantManagementState.cs
index 7b375b979..1ad52ed1b 100644
--- a/Assets/_DDD/_Scripts/RestaurantState/FlowStates/RestaurantManagementState.cs
+++ b/Assets/_DDD/_Scripts/RestaurantState/FlowStates/RestaurantManagementState.cs
@@ -86,7 +86,7 @@ public bool IsOpenable()
 
         public RestaurantManagementData GetManagementData()
         {
-            return RestaurantController.Instance.RestaurantData.ManagementData;
+            return RestaurantData.Instance.ManagementData;
         }
 
         public bool TryAddTodayMenu(ItemViewModel model)
diff --git a/Assets/_DDD/_Scripts/RestaurantState/RestaurantState.cs b/Assets/_DDD/_Scripts/RestaurantState/RestaurantState.cs
index 1d3533637..9370ee616 100644
--- a/Assets/_DDD/_Scripts/RestaurantState/RestaurantState.cs
+++ b/Assets/_DDD/_Scripts/RestaurantState/RestaurantState.cs
@@ -2,7 +2,7 @@
 
 namespace DDD
 {
-    public class RestaurantState : ScriptableObject
+    public class RestaurantState : ScriptSingleton<RestaurantState>
     {
         public RestaurantManagementState ManagementState { get; private set; }
         public RestaurantRunState RunState { get; private set; }
diff --git a/Assets/_DDD/_Scripts/Utilities/ScriptSingleton.cs b/Assets/_DDD/_Scripts/Utilities/ScriptSingleton.cs
new file mode 100644
index 000000000..9cffb682e
--- /dev/null
+++ b/Assets/_DDD/_Scripts/Utilities/ScriptSingleton.cs
@@ -0,0 +1,128 @@
+using System;
+using JetBrains.Annotations;
+using UnityEngine;
+using UnityEngine.AddressableAssets;
+using UnityEngine.ResourceManagement.AsyncOperations;
+
+namespace DDD
+{
+    /// <summary>
+    /// Addressables를 통해 ScriptableObject 에셋을 로드하여 싱글톤으로 제공하는 베이스 클래스.
+    /// - 첫 접근 시 Addressables에서 타입명(네임스페이스 제외)을 키로 동기 로드합니다.
+    /// - 로드에 실패하면 예외를 발생합니다. (새로 생성하지 않습니다)
+    /// - 이미 로드된 경우 캐시된 인스턴스를 반환합니다.
+    /// </summary>
+    /// <typeparam name="T">구현 타입</typeparam>
+    public abstract class ScriptSingleton<T> : ScriptableObject where T : ScriptSingleton<T>
+    {
+        #region  Fields
+        [CanBeNull]
+        private static T _instance;
+
+        [NotNull]
+        private static readonly object _lock = new();
+
+        private static bool _isQuitting;
+        #endregion
+
+        #region  Properties
+        [NotNull]
+        public static T Instance
+        {
+            get
+            {
+                if (_instance != null)
+                    return _instance;
+
+                if (_isQuitting)
+                    throw new InvalidOperationException($"애플리케이션 종료 중에는 '{typeof(T).Name}' 인스턴스를 로드할 수 없습니다.");
+
+                lock (_lock)
+                {
+                    // 이중 체크 락킹 패턴
+                    if (_instance != null)
+                        return _instance;
+
+                    try
+                    {
+                        var key = ResolveAddressKey();
+                        var handle = Addressables.LoadAssetAsync<T>(key);
+
+                        // 동기 로드: 메인 스레드에서 호출할 것을 권장합니다.
+                        var loaded = handle.WaitForCompletion();
+
+                        if (handle.Status != AsyncOperationStatus.Succeeded || loaded == null)
+                        {
+                            throw new InvalidOperationException($"Addressables 로드 실패: 타입='{typeof(T).Name}', key='{key}'");
+                        }
+
+                        _instance = loaded;
+                        _instance.hideFlags = HideFlags.DontUnloadUnusedAsset;
+                        _instance.OnInstanceLoaded();
+
+                        return _instance;
+                    }
+                    catch (Exception)
+                    {
+                        throw;
+                    }
+                }
+            }
+        }
+        #endregion
+
+        #region  Methods
+        /// <summary>
+        /// 새로운 인스턴스를 생성하고 싱글톤으로 등록합니다.
+        /// Addressables에 등록되지 않은 경우 사용합니다.
+        /// </summary>
+        public static T CreateScriptSingleton()
+        {
+            if (_instance != null)
+            {
+                Debug.LogWarning($"[ScriptSingleton] {typeof(T).Name} 인스턴스가 이미 존재합니다. 기존 인스턴스를 반환합니다.");
+                return _instance;
+            }
+
+            lock (_lock)
+            {
+                if (_instance != null)
+                    return _instance;
+
+                var newInstance = ScriptableObject.CreateInstance<T>();
+                _instance = newInstance;
+                _instance.hideFlags = HideFlags.DontUnloadUnusedAsset;
+                _instance.OnInstanceLoaded();
+
+                Debug.Log($"[ScriptSingleton] {typeof(T).Name} 인스턴스를 생성하고 싱글톤으로 등록했습니다.");
+                return _instance;
+            }
+        }
+
+        /// <summary>
+        /// 사용자 정의 초기화 훅. 인스턴스가 로드된 뒤 1회 호출됩니다.
+        /// </summary>
+        protected virtual void OnInstanceLoaded() { }
+
+        [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.AfterAssembliesLoaded)]
+        private static void RegisterQuitHandler()
+        {
+            Application.quitting -= OnApplicationQuitting;
+            Application.quitting += OnApplicationQuitting;
+        }
+
+        private static void OnApplicationQuitting()
+        {
+            _isQuitting = true;
+        }
+
+        /// <summary>
+        /// Address Key를 해석합니다. 요구사항에 따라 타입명(네임스페이스 제외) 그대로를 사용합니다.
+        /// </summary>
+        private static string ResolveAddressKey()
+        {
+            return typeof(T).Name;
+        }
+        #endregion
+    }
+}
\ No newline at end of file
diff --git a/Assets/_DDD/_Scripts/Utilities/ScriptSingleton.cs.meta b/Assets/_DDD/_Scripts/Utilities/ScriptSingleton.cs.meta
new file mode 100644
index 000000000..528f97b45
--- /dev/null
+++ b/Assets/_DDD/_Scripts/Utilities/ScriptSingleton.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 0544b64d4ef0a744dbd9ee6bcf4ecc00
\ No newline at end of file