diff --git a/Assets/Scripts/Core.cs b/Assets/Scripts/Core.cs
index 988abe1..e5bc493 100644
--- a/Assets/Scripts/Core.cs
+++ b/Assets/Scripts/Core.cs
@@ -194,15 +194,16 @@ namespace Northbound
                 return false;
 
             // 플레이어가 자원을 가지고 있는지 확인
-            if (NetworkManager.Singleton != null &&
-                NetworkManager.Singleton.ConnectedClients.TryGetValue(playerId, out var client))
+            // NetworkPlayerController로 찾기 (서버 소유권으로 스폰한 경우 PlayerObject가 null일 수 있음)
+            var spawnedObjects = NetworkManager.Singleton.SpawnManager.SpawnedObjects;
+            foreach (var kvp in spawnedObjects)
             {
-                if (client.PlayerObject != null)
+                var controller = kvp.Value.GetComponent<NetworkPlayerController>();
+                if (controller != null && controller.OwnerPlayerId == playerId)
                 {
-                    var playerInventory = client.PlayerObject.GetComponent<PlayerResourceInventory>();
+                    var playerInventory = kvp.Value.GetComponent<PlayerResourceInventory>();
                     if (playerInventory != null)
                     {
-                        // 플레이어가 자원을 가지고 있어야 함
                         return playerInventory.CurrentResourceAmount > 0;
                     }
                 }
@@ -297,13 +298,23 @@ namespace Northbound
         [Rpc(SendTo.ClientsAndHost)]
         private void UpdatePlayerResourcesClientRpc(ulong playerId)
         {
-            var playerObject = NetworkManager.Singleton.ConnectedClients[playerId].PlayerObject;
-            if (playerObject != null)
+            // 해당 플레이어만 업데이트
+            if (NetworkManager.Singleton.LocalClientId != playerId)
+                return;
+
+            // 로컬 플레이어의 PlayerResourceInventory 찾아서 업데이트 요청
+            var spawnedObjects = NetworkManager.Singleton.SpawnManager.SpawnedObjects;
+            foreach (var kvp in spawnedObjects)
             {
-                var playerInventory = playerObject.GetComponent<PlayerResourceInventory>();
-                if (playerInventory != null)
+                var controller = kvp.Value.GetComponent<NetworkPlayerController>();
+                if (controller != null && controller.IsLocalPlayer)
                 {
-                    playerInventory.RequestResourceUpdateServerRpc();
+                    var inventory = kvp.Value.GetComponent<PlayerResourceInventory>();
+                    if (inventory != null)
+                    {
+                        inventory.RequestResourceUpdateServerRpc(playerId);
+                        return;
+                    }
                 }
             }
         }
diff --git a/Assets/Scripts/GameResourceUI.cs b/Assets/Scripts/GameResourceUI.cs
index 2d8d985..7768b3b 100644
--- a/Assets/Scripts/GameResourceUI.cs
+++ b/Assets/Scripts/GameResourceUI.cs
@@ -171,9 +171,26 @@ namespace Northbound
 
             ulong localClientId = NetworkManager.Singleton.LocalClientId;
 
+            // PlayerObject가 있으면 사용
             if (NetworkManager.Singleton.ConnectedClients.TryGetValue(localClientId, out var client))
             {
-                return client.PlayerObject?.gameObject;
+                if (client.PlayerObject != null)
+                {
+                    return client.PlayerObject.gameObject;
+                }
+            }
+
+            // PlayerObject가 없으면 NetworkPlayerController로 찾기
+            // (서버 소유권으로 스폰한 경우 PlayerObject가 null일 수 있음)
+            var allNetworkObjects = NetworkManager.Singleton.SpawnManager.SpawnedObjects;
+            foreach (var kvp in allNetworkObjects)
+            {
+                var networkObj = kvp.Value;
+                var playerController = networkObj.GetComponent<NetworkPlayerController>();
+                if (playerController != null && playerController.IsLocalPlayer)
+                {
+                    return networkObj.gameObject;
+                }
             }
 
             return null;
diff --git a/Assets/Scripts/InteractableModalManager.cs b/Assets/Scripts/InteractableModalManager.cs
index bff2be8..1896c93 100644
--- a/Assets/Scripts/InteractableModalManager.cs
+++ b/Assets/Scripts/InteractableModalManager.cs
@@ -104,10 +104,10 @@ namespace Northbound
             if (playerInteraction == null)
                 return false;
 
-            var networkObject = playerInteraction.GetComponent<Unity.Netcode.NetworkObject>();
-            if (networkObject != null)
+            var networkPlayerController = playerInteraction.GetComponent<NetworkPlayerController>();
+            if (networkPlayerController != null)
             {
-                return networkObject.IsOwner;
+                return networkPlayerController.IsLocalPlayer;
             }
             return false;
         }
diff --git a/Assets/Scripts/NetworkConnectionHandler.cs b/Assets/Scripts/NetworkConnectionHandler.cs
index 0e7bdeb..221d188 100644
--- a/Assets/Scripts/NetworkConnectionHandler.cs
+++ b/Assets/Scripts/NetworkConnectionHandler.cs
@@ -110,8 +110,16 @@ namespace Northbound
             {
                 return;
             }
-             
-            networkObject.SpawnAsPlayerObject(clientId);
+            
+            // 서버 소유권으로 스폰
+            networkObject.SpawnWithOwnership(NetworkManager.ServerClientId);
+
+            // 플레이어 컨트롤러 초기화
+            var playerController = playerObject.GetComponent<NetworkPlayerController>();
+            if (playerController != null)
+            {
+                playerController.Initialize(clientId);
+            }
         }
 
         private void ApprovalCheck(
diff --git a/Assets/Scripts/NetworkPlayerController.cs b/Assets/Scripts/NetworkPlayerController.cs
index 4488571..5e3fe7d 100644
--- a/Assets/Scripts/NetworkPlayerController.cs
+++ b/Assets/Scripts/NetworkPlayerController.cs
@@ -1,4 +1,6 @@
+using System;
 using Unity.Netcode;
+using Unity.Netcode.Components;
 using UnityEngine;
 using UnityEngine.InputSystem;
 using Unity.Cinemachine;
@@ -20,6 +22,13 @@ public class NetworkPlayerController : NetworkBehaviour, ITeamMember, IDamageabl
     [SerializeField] private GameObject damageEffectPrefab;
     [SerializeField] private GameObject deathEffectPrefab;
 
+    // 이 플레이어를 제어하는 클라이언트 ID (서버 소유권이지만 논리적 소유자)
+    private NetworkVariable<ulong> _ownerPlayerId = new NetworkVariable<ulong>(
+        ulong.MaxValue,
+        NetworkVariableReadPermission.Everyone,
+        NetworkVariableWritePermission.Server
+    );
+
     private NetworkVariable<TeamType> _team = new NetworkVariable<TeamType>(
         TeamType.Player,
         NetworkVariableReadPermission.Everyone,
@@ -36,11 +45,21 @@ public class NetworkPlayerController : NetworkBehaviour, ITeamMember, IDamageabl
     private CharacterController _controller;
     private PlayerInputActions _inputActions;
     private Animator _animator;
+    private NetworkAnimator _networkAnimator;
+
+    // 이 플레이어가 로컬 플레이어인지 확인
+    public bool IsLocalPlayer => _ownerPlayerId.Value == NetworkManager.Singleton.LocalClientId;
+
+    public ulong OwnerPlayerId => _ownerPlayerId.Value;
+
+    // 소유자 변경 이벤트
+    public event Action<ulong> OnOwnerChanged;
 
     void Awake()
     {
         _controller = GetComponent<CharacterController>();
         _animator = GetComponent<Animator>();
+        _networkAnimator = GetComponent<NetworkAnimator>();
     }
 
     public override void OnNetworkSpawn()
@@ -61,28 +80,52 @@ public class NetworkPlayerController : NetworkBehaviour, ITeamMember, IDamageabl
             }
         }
 
-        // 체력 변경 이벤트 구독
+        // 이벤트 구독
         _currentHealth.OnValueChanged += OnHealthChanged;
+        _ownerPlayerId.OnValueChanged += OnOwnerPlayerIdChanged;
 
-        if (!IsOwner) return;
+        // 이미 로컬 플레이어로 설정되어 있으면 입력 초기화
+        TryInitializeLocalPlayer();
+    }
 
-            var vcam = GameObject.FindFirstObjectByType<CinemachineCamera>();
+    private void OnOwnerPlayerIdChanged(ulong previousValue, ulong newValue)
+    {
+        OnOwnerChanged?.Invoke(newValue);
+        TryInitializeLocalPlayer();
+    }
 
-            if (vcam != null)
-            {
-                vcam.Follow = transform;
-                vcam.LookAt = transform;
-            }
+    private void TryInitializeLocalPlayer()
+    {
+        if (!IsLocalPlayer) return;
+        if (_inputActions != null) return; // 이미 초기화됨
+
+        var vcam = GameObject.FindFirstObjectByType<CinemachineCamera>();
+
+        if (vcam != null)
+        {
+            vcam.Follow = transform;
+            vcam.LookAt = transform;
+        }
 
         _inputActions = new PlayerInputActions();
         _inputActions.Enable();
     }
 
+    /// <summary>
+    /// 플레이어 초기화 (서버에서 호출)
+    /// </summary>
+    public void Initialize(ulong ownerPlayerId)
+    {
+        if (!IsServer) return;
+        _ownerPlayerId.Value = ownerPlayerId;
+    }
+
     public override void OnNetworkDespawn()
     {
         _currentHealth.OnValueChanged -= OnHealthChanged;
+        _ownerPlayerId.OnValueChanged -= OnOwnerPlayerIdChanged;
 
-        if (IsOwner && _inputActions != null)
+        if (IsLocalPlayer && _inputActions != null)
         {
             _inputActions.Disable();
         }
@@ -92,7 +135,11 @@ public class NetworkPlayerController : NetworkBehaviour, ITeamMember, IDamageabl
 
     void Update()
     {
-        if (!IsOwner) return;
+        // 로컬 플레이어만 입력 처리
+        if (!IsLocalPlayer) return;
+
+        // 입력 시스템이 초기화되지 않았으면 스킵
+        if (_inputActions == null) return;
 
         // 죽었으면 이동 불가
         if (_currentHealth.Value <= 0) return;
@@ -106,16 +153,30 @@ public class NetworkPlayerController : NetworkBehaviour, ITeamMember, IDamageabl
         
         if (isActionBlocked) 
         {
-            // 이동 불가 시 애니메이션 속도를 0으로
-            if (_animator != null)
-            {
-                _animator.SetFloat("MoveSpeed", 0f);
-            }
+            // 서버에 이동 중지 알림 (애니메이션 포함)
+            MoveServerRpc(Vector2.zero);
             return;
         }
 
         _moveInput = _inputActions.Player.Move.ReadValue<Vector2>();
-        Vector3 move = new Vector3(_moveInput.x, 0, _moveInput.y).normalized;
+        
+        // 서버에 이동 요청 전송 (애니메이션 포함)
+        MoveServerRpc(_moveInput);
+    }
+
+    [Rpc(SendTo.Server)]
+    private void MoveServerRpc(Vector2 moveInput)
+    {
+        // 죽었으면 이동 불가
+        if (_currentHealth.Value <= 0) return;
+
+        Vector3 move = new Vector3(moveInput.x, 0, moveInput.y).normalized;
+
+        // NetworkAnimator로 애니메이션 동기화
+        if (_networkAnimator != null)
+        {
+            _networkAnimator.Animator.SetFloat("MoveSpeed", move.magnitude);
+        }
 
         if (move.magnitude >= 0.1f)
         {
@@ -127,11 +188,6 @@ public class NetworkPlayerController : NetworkBehaviour, ITeamMember, IDamageabl
                 _controller.Move(move * moveSpeed * Time.deltaTime);
             }
         }
-
-        if (_animator != null)
-        {
-            _animator.SetFloat("MoveSpeed", move.magnitude);
-        }
     }
 
     #region ITeamMember Implementation
@@ -149,7 +205,6 @@ public class NetworkPlayerController : NetworkBehaviour, ITeamMember, IDamageabl
     #endregion
 
     #region IDamageable Implementation
-
     public void TakeDamage(int damage, ulong attackerId)
     {
         if (!IsServer) return;
@@ -184,17 +239,17 @@ public class NetworkPlayerController : NetworkBehaviour, ITeamMember, IDamageabl
         }
     }
 
-        private void Die(ulong killerId)
-        {
-            if (!IsServer) return;
+    private void Die(ulong killerId)
+    {
+        if (!IsServer) return;
 
-            // 사망 이펙트
+        // 사망 이펙트
         ShowDeathEffectClientRpc();
 
-        // 애니메이션 (있는 경우)
-        if (_animator != null)
+        // 애니메이션 - NetworkAnimator로 동기화
+        if (_networkAnimator != null)
         {
-            _animator.SetTrigger("Die");
+            _networkAnimator.SetTrigger("Die");
         }
 
         // 일정 시간 후 리스폰 또는 디스폰
@@ -205,8 +260,6 @@ public class NetworkPlayerController : NetworkBehaviour, ITeamMember, IDamageabl
     {
         if (!IsServer) return;
 
-        // 여기서 리스폰 로직을 추가하거나 게임 오버 처리
-        // 예: 리스폰 위치로 이동 및 체력 회복
         Respawn();
     }
 
@@ -217,16 +270,20 @@ public class NetworkPlayerController : NetworkBehaviour, ITeamMember, IDamageabl
         // 체력 회복
         _currentHealth.Value = maxHealth;
 
-        // 스폰 포인트로 이동 (PlayerSpawnPoint 활용)
+        // 스폰 포인트로 이동
         var spawnPoints = FindObjectsByType<PlayerSpawnPoint>(FindObjectsSortMode.None);
         if (spawnPoints.Length > 0)
         {
-            var spawnPoint = spawnPoints[Random.Range(0, spawnPoints.Length)];
+            var spawnPoint = spawnPoints[UnityEngine.Random.Range(0, spawnPoints.Length)];
             transform.position = spawnPoint.transform.position;
             transform.rotation = spawnPoint.transform.rotation;
         }
 
-        _animator.SetTrigger("Revive");
+        // NetworkAnimator로 애니메이션 동기화
+        if (_networkAnimator != null)
+        {
+            _networkAnimator.SetTrigger("Revive");
+        }
     }
 
     [ClientRpc]
@@ -253,32 +310,17 @@ public class NetworkPlayerController : NetworkBehaviour, ITeamMember, IDamageabl
 
     #region Health Management
 
-    /// <summary>
-    /// 현재 체력
-    /// </summary>
     public int GetCurrentHealth() => _currentHealth.Value;
 
-    /// <summary>
-    /// 최대 체력
-    /// </summary>
     public int GetMaxHealth() => maxHealth;
 
-    /// <summary>
-    /// 체력 비율 (0.0 ~ 1.0)
-    /// </summary>
     public float GetHealthPercentage()
     {
         return maxHealth > 0 ? (float)_currentHealth.Value / maxHealth : 0f;
     }
 
-    /// <summary>
-    /// 죽었는지 여부
-    /// </summary>
     public bool IsDead() => _currentHealth.Value <= 0;
 
-    /// <summary>
-    /// 체력 회복
-    /// </summary>
     public void Heal(int amount)
     {
         if (!IsServer) return;
@@ -289,10 +331,7 @@ public class NetworkPlayerController : NetworkBehaviour, ITeamMember, IDamageabl
 
     private void OnHealthChanged(int previousValue, int newValue)
     {
-        // 체력바 UI 업데이트 또는 체력 변경 시각 효과
-
-        // 클라이언트에서도 체력 변경 인지 가능
-        if (IsOwner)
+        if (IsLocalPlayer)
         {
             // UI 업데이트 등
         }
diff --git a/Assets/Scripts/PlayerActionSystem.cs b/Assets/Scripts/PlayerActionSystem.cs
index 4759507..77a8064 100644
--- a/Assets/Scripts/PlayerActionSystem.cs
+++ b/Assets/Scripts/PlayerActionSystem.cs
@@ -1,4 +1,5 @@
 using Unity.Netcode;
+using Unity.Netcode.Components;
 using UnityEngine;
 using UnityEngine.InputSystem;
 using System.Collections.Generic;
@@ -19,17 +20,23 @@ namespace Northbound
         private PlayerInputActions _inputActions;
         private Dictionary<string, IAction> _actions = new Dictionary<string, IAction>();
         private Animator _animator;
+        private NetworkAnimator _networkAnimator;
+        private NetworkPlayerController _networkPlayerController;
+
+        // 로컬 플레이어인지 확인
+        private bool IsLocalPlayer => _networkPlayerController != null && _networkPlayerController.IsLocalPlayer;
+        private ulong LocalPlayerId => _networkPlayerController != null ? _networkPlayerController.OwnerPlayerId : OwnerClientId;
 
         private void Awake()
         {
             _animator = GetComponent<Animator>();
+            _networkAnimator = GetComponent<NetworkAnimator>();
+            _networkPlayerController = GetComponent<NetworkPlayerController>();
         }
 
         public override void OnNetworkSpawn()
         {
-            if (!IsOwner) return;
-
-            // 액션 컴포넌트들을 딕셔너리에 등록
+            // 액션 컴포넌트들을 딕셔너리에 등록 (모든 클라이언트에서)
             foreach (var component in actionComponents)
             {
                 if (component is IAction action)
@@ -38,15 +45,39 @@ namespace Northbound
                 }
             }
 
+            // _ownerPlayerId 변경 이벤트 구독
+            if (_networkPlayerController != null)
+            {
+                _networkPlayerController.OnOwnerChanged += OnOwnerPlayerIdChanged;
+            }
+
+            // 이미 로컬 플레이어면 입력 초기화
+            TryInitializeInput();
+        }
+
+        private void OnOwnerPlayerIdChanged(ulong newOwnerId)
+        {
+            TryInitializeInput();
+        }
+
+        private void TryInitializeInput()
+        {
+            if (!IsLocalPlayer) return;
+            if (_inputActions != null) return;
+
             _inputActions = new PlayerInputActions();
             _inputActions.Player.Attack.performed += OnAttack;
-            // 다른 액션들도 여기에 바인딩
             _inputActions.Enable();
         }
 
         public override void OnNetworkDespawn()
         {
-            if (IsOwner && _inputActions != null)
+            if (_networkPlayerController != null)
+            {
+                _networkPlayerController.OnOwnerChanged -= OnOwnerPlayerIdChanged;
+            }
+
+            if (_inputActions != null)
             {
                 _inputActions.Player.Attack.performed -= OnAttack;
                 _inputActions.Disable();
@@ -63,23 +94,30 @@ namespace Northbound
         {
             if (_actions.TryGetValue(actionName, out IAction action))
             {
-                if (action.CanExecute(OwnerClientId))
+                if (action.CanExecute(LocalPlayerId))
                 {
-                    // 애니메이션 재생 (액션 실행 전)
-                    if (playAnimations && _animator != null)
+                    string animTrigger = action.GetActionAnimation();
+                    
+                    // 서버에서 애니메이션 실행 (동기화를 위해)
+                    if (playAnimations && !string.IsNullOrEmpty(animTrigger))
                     {
-                        string animTrigger = action.GetActionAnimation();
-                        if (!string.IsNullOrEmpty(animTrigger))
-                        {
-                            _animator.SetTrigger(animTrigger);
-                        }
+                        PlayAnimationServerRpc(animTrigger);
                     }
 
-                    action.Execute(OwnerClientId);
+                    action.Execute(LocalPlayerId);
                 }
             }
         }
 
+        [Rpc(SendTo.Server)]
+        private void PlayAnimationServerRpc(string animTrigger)
+        {
+            if (_networkAnimator != null && !string.IsNullOrEmpty(animTrigger))
+            {
+                _networkAnimator.SetTrigger(animTrigger);
+            }
+        }
+
         override public void OnDestroy()
         {
             if (_inputActions != null)
diff --git a/Assets/Scripts/PlayerInteraction.cs b/Assets/Scripts/PlayerInteraction.cs
index 26a64aa..fcca994 100644
--- a/Assets/Scripts/PlayerInteraction.cs
+++ b/Assets/Scripts/PlayerInteraction.cs
@@ -1,4 +1,5 @@
 using Unity.Netcode;
+using Unity.Netcode.Components;
 using UnityEngine;
 using UnityEngine.InputSystem;
 
@@ -37,6 +38,7 @@ namespace Northbound
         private IInteractable _unavailableInteractable;
         private Camera _mainCamera;
         private Animator _animator;
+        private NetworkAnimator _networkAnimator;
         private EquipmentSocket _equipmentSocket;
         
         private EquipmentData _pendingEquipmentData;
@@ -44,21 +46,51 @@ namespace Northbound
         private bool _isInteracting = false;
         private Coroutine _interactionTimeoutCoroutine;
 
+        private NetworkPlayerController _networkPlayerController;
+
         public bool IsInteracting => _isInteracting;
         public float WorkPower => workPower;
         public IInteractable CurrentUnavailableInteractable => _unavailableInteractable;
 
+        // 로컬 플레이어인지 확인
+        private bool IsLocalPlayer => _networkPlayerController != null && _networkPlayerController.IsLocalPlayer;
+        private ulong LocalPlayerId => _networkPlayerController != null ? _networkPlayerController.OwnerPlayerId : OwnerClientId;
+
+        private void Awake()
+        {
+            _networkPlayerController = GetComponent<NetworkPlayerController>();
+            _networkAnimator = GetComponent<NetworkAnimator>();
+        }
+
         public override void OnNetworkSpawn()
         {
-            if (!IsOwner) return;
-
-            _mainCamera = Camera.main;
             _animator = GetComponent<Animator>();
             _equipmentSocket = GetComponent<EquipmentSocket>();
             
             if (rayOrigin == null)
                 rayOrigin = transform;
 
+            // _ownerPlayerId 변경 이벤트 구독
+            if (_networkPlayerController != null)
+            {
+                _networkPlayerController.OnOwnerChanged += OnOwnerPlayerIdChanged;
+            }
+
+            // 이미 로컬 플레이어면 입력 초기화
+            TryInitializeInput();
+        }
+
+        private void OnOwnerPlayerIdChanged(ulong newOwnerId)
+        {
+            TryInitializeInput();
+        }
+
+        private void TryInitializeInput()
+        {
+            if (!IsLocalPlayer) return;
+            if (_inputActions != null) return;
+
+            _mainCamera = Camera.main;
             _inputActions = new PlayerInputActions();
             _inputActions.Player.Interact.performed += OnInteract;
             _inputActions.Enable();
@@ -66,7 +98,12 @@ namespace Northbound
 
         public override void OnNetworkDespawn()
         {
-            if (IsOwner && _inputActions != null)
+            if (_networkPlayerController != null)
+            {
+                _networkPlayerController.OnOwnerChanged -= OnOwnerPlayerIdChanged;
+            }
+
+            if (_inputActions != null)
             {
                 _inputActions.Player.Interact.performed -= OnInteract;
                 _inputActions.Disable();
@@ -76,12 +113,11 @@ namespace Northbound
 
         private void Update()
         {
-            if (!IsOwner) return;
+            if (!IsLocalPlayer) return;
             
-            // Check if current interactable is no longer valid (e.g., building completed)
             if (_isInteracting && _currentInteractable != null)
             {
-                if (!_currentInteractable.CanInteract(OwnerClientId))
+                if (!_currentInteractable.CanInteract(LocalPlayerId))
                 {
                     EndInteraction();
                 }
@@ -92,6 +128,13 @@ namespace Northbound
 
         private void DetectInteractable()
         {
+            // 카메라가 없으면 다시 시도
+            if (_mainCamera == null)
+            {
+                _mainCamera = Camera.main;
+                if (_mainCamera == null) return;
+            }
+            
             Vector3 origin = rayOrigin.position;
             Vector3 direction = useForwardDirection ? transform.forward : _mainCamera.transform.forward;
 
@@ -112,7 +155,7 @@ namespace Northbound
 
                 if (interactable != null)
                 {
-                    if (interactable.CanInteract(OwnerClientId))
+                    if (interactable.CanInteract(LocalPlayerId))
                     {
                         _currentInteractable = interactable;
                         _unavailableInteractable = null;
@@ -120,7 +163,6 @@ namespace Northbound
                     }
                     else
                     {
-                        // CanInteract가 false인 경우 추적
                         _currentInteractable = null;
                         _unavailableInteractable = interactable;
                         return;
@@ -139,8 +181,14 @@ namespace Northbound
 
             if (_currentInteractable != null)
             {
+                // 상호작용 가능 여부 다시 확인 (NetworkVariable 동기화 지연 대응)
+                if (!_currentInteractable.CanInteract(LocalPlayerId))
+                {
+                    return;
+                }
+
                 bool isResource = _currentInteractable is Resource;
-                bool hasWorker = assignedWorker != null && assignedWorker.OwnerPlayerId == OwnerClientId;
+                bool hasWorker = assignedWorker != null && assignedWorker.OwnerPlayerId == LocalPlayerId;
                 bool isWorkerFollowing = hasWorker && (int)assignedWorker.CurrentState == 1;
                 bool shouldPlayAnimation = !isResource || !hasWorker || !isWorkerFollowing;
 
@@ -150,9 +198,10 @@ namespace Northbound
                 string animTrigger = _currentInteractable.GetInteractionAnimation();
                 bool hasAnimation = !string.IsNullOrEmpty(animTrigger);
 
-                if (playAnimations && _animator != null && hasAnimation && shouldPlayAnimation)
+                if (playAnimations && hasAnimation && shouldPlayAnimation)
                 {
-                    _animator.SetTrigger(animTrigger);
+                    // 서버에서 애니메이션 실행 (동기화를 위해)
+                    PlayAnimationServerRpc(animTrigger);
                     _interactionTimeoutCoroutine = StartCoroutine(InteractionTimeout(3f));
                 }
                 else
@@ -173,13 +222,18 @@ namespace Northbound
                     }
                 }
 
-                _currentInteractable.Interact(OwnerClientId);
+                _currentInteractable.Interact(LocalPlayerId);
             }
         }
 
-        // ========================================
-        // Animation Event 함수들
-        // ========================================
+        [Rpc(SendTo.Server)]
+        private void PlayAnimationServerRpc(string animTrigger)
+        {
+            if (_networkAnimator != null && !string.IsNullOrEmpty(animTrigger))
+            {
+                _networkAnimator.SetTrigger(animTrigger);
+            }
+        }
 
         public void OnEquipTool()
         {
@@ -207,7 +261,7 @@ namespace Northbound
 
         public void OnInteractionComplete()
         {
-            if (!IsOwner) return;
+            if (!IsLocalPlayer) return;
             
             if (_interactionTimeoutCoroutine != null)
             {
@@ -217,10 +271,6 @@ namespace Northbound
             _isInteracting = false;
         }
 
-        // ========================================
-        // 내부 헬퍼 함수들
-        // ========================================
-
         private void AttachEquipment(string socketName = null)
         {
             if (_equipmentSocket == null || _pendingEquipmentData == null)
@@ -283,7 +333,13 @@ namespace Northbound
 
         private void OnGUI()
         {
-            if (!IsOwner) return;
+            if (!IsLocalPlayer) return;
+            
+            // 디버그: _mainCamera 상태 확인
+            if (_mainCamera == null)
+            {
+                _mainCamera = Camera.main;
+            }
 
             GUIStyle style = new GUIStyle(GUI.skin.label)
             {
@@ -299,7 +355,7 @@ namespace Northbound
                 prompt = _currentInteractable.GetInteractionPrompt();
                 
                 bool isResource = _currentInteractable is Resource;
-                if (isResource && assignedWorker != null && assignedWorker.OwnerPlayerId == OwnerClientId)
+                if (isResource && assignedWorker != null && assignedWorker.OwnerPlayerId == LocalPlayerId)
                 {
                     prompt += " (워커 할당 가능)";
                 }
@@ -311,7 +367,7 @@ namespace Northbound
                 }
             }
 
-            if (assignedWorker != null && assignedWorker.OwnerPlayerId == OwnerClientId)
+            if (assignedWorker != null && assignedWorker.OwnerPlayerId == LocalPlayerId)
             {
                 string workerStatus = assignedWorker.CurrentState switch
                 {
diff --git a/Assets/Scripts/PlayerResourceInventory.cs b/Assets/Scripts/PlayerResourceInventory.cs
index 3bde825..bfef347 100644
--- a/Assets/Scripts/PlayerResourceInventory.cs
+++ b/Assets/Scripts/PlayerResourceInventory.cs
@@ -11,32 +11,65 @@ namespace Northbound
         public int CurrentResourceAmount => _displayAmount;
         public int MaxResourceCapacity => maxResourceCapacity;
 
+        private NetworkPlayerController _networkPlayerController;
+
+        private bool IsLocalPlayer => _networkPlayerController != null && _networkPlayerController.IsLocalPlayer;
+        private ulong LocalPlayerId => _networkPlayerController != null ? _networkPlayerController.OwnerPlayerId : OwnerClientId;
+
+        private void Awake()
+        {
+            _networkPlayerController = GetComponent<NetworkPlayerController>();
+        }
+
         [Rpc(SendTo.Server)]
-        private void SetMaxCapacityServerRpc(int maxCapacity)
+        private void SetMaxCapacityServerRpc(int maxCapacity, ulong playerId)
         {
             var resourceManager = ServerResourceManager.Instance;
             if (resourceManager != null)
             {
-                resourceManager.SetPlayerMaxCapacity(OwnerClientId, maxCapacity);
+                resourceManager.SetPlayerMaxCapacity(playerId, maxCapacity);
             }
         }
 
         public override void OnNetworkSpawn()
         {
-            if (IsClient && IsOwner)
+            // _ownerPlayerId 변경 이벤트 구독
+            if (_networkPlayerController != null)
             {
-                SetMaxCapacityServerRpc(maxResourceCapacity);
-                RequestResourceUpdateServerRpc();
+                _networkPlayerController.OnOwnerChanged += OnOwnerPlayerIdChanged;
+            }
+
+            TryInitialize();
+        }
+
+        private void OnOwnerPlayerIdChanged(ulong newOwnerId)
+        {
+            TryInitialize();
+        }
+
+        private void TryInitialize()
+        {
+            if (!IsLocalPlayer) return;
+            
+            SetMaxCapacityServerRpc(maxResourceCapacity, LocalPlayerId);
+            RequestResourceUpdateServerRpc(LocalPlayerId);
+        }
+
+        public override void OnNetworkDespawn()
+        {
+            if (_networkPlayerController != null)
+            {
+                _networkPlayerController.OnOwnerChanged -= OnOwnerPlayerIdChanged;
             }
         }
 
         [Rpc(SendTo.Server)]
-        public void RequestResourceUpdateServerRpc()
+        public void RequestResourceUpdateServerRpc(ulong playerId)
         {
             var resourceManager = ServerResourceManager.Instance;
             if (resourceManager != null)
             {
-                int amount = resourceManager.GetPlayerResourceAmount(OwnerClientId);
+                int amount = resourceManager.GetPlayerResourceAmount(playerId);
                 UpdateResourceAmountClientRpc(amount);
             }
         }
@@ -57,7 +90,7 @@ namespace Northbound
             var resourceManager = ServerResourceManager.Instance;
             if (resourceManager != null)
             {
-                return resourceManager.CanAddResource(OwnerClientId, amount);
+                return resourceManager.CanAddResource(LocalPlayerId, amount);
             }
             return false;
         }
@@ -67,7 +100,7 @@ namespace Northbound
             var resourceManager = ServerResourceManager.Instance;
             if (resourceManager != null)
             {
-                return resourceManager.GetAvailableSpace(OwnerClientId);
+                return resourceManager.GetAvailableSpace(LocalPlayerId);
             }
             return 0;
         }
diff --git a/Assets/Scripts/Resource.cs b/Assets/Scripts/Resource.cs
index 5966b7c..733139d 100644
--- a/Assets/Scripts/Resource.cs
+++ b/Assets/Scripts/Resource.cs
@@ -235,14 +235,45 @@ namespace Northbound
             if (Time.time - _lastGatheringTime < gatheringCooldown)
                 return false;
 
+            // 플레이어의 자원 공간 확인
+            int availableSpace = GetPlayerAvailableSpace(playerId);
+            if (availableSpace <= 0)
+                return false;
+
+            return true;
+        }
+
+        /// <summary>
+        /// 플레이어의 자원 공간 확인 (서버와 클라이언트 모두 지원)
+        /// </summary>
+        private int GetPlayerAvailableSpace(ulong playerId)
+        {
+            // 서버에서는 ServerResourceManager 사용
             var resourceManager = ServerResourceManager.Instance;
             if (resourceManager != null)
             {
-                if (resourceManager.GetAvailableSpace(playerId) <= 0)
-                    return false;
+                return resourceManager.GetAvailableSpace(playerId);
             }
 
-            return true;
+            // 클라이언트에서는 PlayerResourceInventory 사용
+            if (NetworkManager.Singleton != null)
+            {
+                var spawnedObjects = NetworkManager.Singleton.SpawnManager.SpawnedObjects;
+                foreach (var kvp in spawnedObjects)
+                {
+                    var controller = kvp.Value.GetComponent<NetworkPlayerController>();
+                    if (controller != null && controller.OwnerPlayerId == playerId)
+                    {
+                        var inventory = kvp.Value.GetComponent<PlayerResourceInventory>();
+                        if (inventory != null)
+                        {
+                            return inventory.MaxResourceCapacity - inventory.CurrentResourceAmount;
+                        }
+                    }
+                }
+            }
+
+            return 0;
         }
 
         public void Interact(ulong playerId)
@@ -324,15 +355,28 @@ namespace Northbound
             ShowGatheringEffectClientRpc();
         }
 
-        [Rpc(SendTo.Owner)]
+        [Rpc(SendTo.ClientsAndHost)]
         private void UpdatePlayerResourcesClientRpc(ulong playerId)
         {
-            var playerObject = NetworkManager.Singleton.ConnectedClients[playerId]?.PlayerObject;
-            if (playerObject == null)
+            // 해당 플레이어만 업데이트
+            if (NetworkManager.Singleton.LocalClientId != playerId)
                 return;
 
-            var playerInventory = playerObject.GetComponent<PlayerResourceInventory>();
-            playerInventory?.RequestResourceUpdateServerRpc();
+            // 로컬 플레이어의 PlayerResourceInventory 찾아서 업데이트 요청
+            var spawnedObjects = NetworkManager.Singleton.SpawnManager.SpawnedObjects;
+            foreach (var kvp in spawnedObjects)
+            {
+                var controller = kvp.Value.GetComponent<NetworkPlayerController>();
+                if (controller != null && controller.IsLocalPlayer)
+                {
+                    var inventory = kvp.Value.GetComponent<PlayerResourceInventory>();
+                    if (inventory != null)
+                    {
+                        inventory.RequestResourceUpdateServerRpc(playerId);
+                        return;
+                    }
+                }
+            }
         }
 
         [Rpc(SendTo.NotServer)]
diff --git a/Assets/Scripts/ResourcePickup.cs b/Assets/Scripts/ResourcePickup.cs
index 15bede0..91f907c 100644
--- a/Assets/Scripts/ResourcePickup.cs
+++ b/Assets/Scripts/ResourcePickup.cs
@@ -88,15 +88,28 @@ namespace Northbound
             Invoke(nameof(DestroyPickup), 0.1f);
         }
 
-        [Rpc(SendTo.Owner)]
+        [Rpc(SendTo.ClientsAndHost)]
         private void UpdatePlayerResourcesClientRpc(ulong playerId)
         {
-            var playerObject = NetworkManager.Singleton.ConnectedClients[playerId]?.PlayerObject;
-            if (playerObject == null)
+            // 해당 플레이어만 업데이트
+            if (NetworkManager.Singleton.LocalClientId != playerId)
                 return;
 
-            var playerInventory = playerObject.GetComponent<PlayerResourceInventory>();
-            playerInventory?.RequestResourceUpdateServerRpc();
+            // 로컬 플레이어의 PlayerResourceInventory 찾아서 업데이트 요청
+            var spawnedObjects = NetworkManager.Singleton.SpawnManager.SpawnedObjects;
+            foreach (var kvp in spawnedObjects)
+            {
+                var controller = kvp.Value.GetComponent<NetworkPlayerController>();
+                if (controller != null && controller.IsLocalPlayer)
+                {
+                    var inventory = kvp.Value.GetComponent<PlayerResourceInventory>();
+                    if (inventory != null)
+                    {
+                        inventory.RequestResourceUpdateServerRpc(playerId);
+                        return;
+                    }
+                }
+            }
         }
 
         [Rpc(SendTo.ClientsAndHost)]