diff --git a/Assets/Scripts/GlobalTimer.cs b/Assets/Scripts/GlobalTimer.cs
new file mode 100644
index 0000000..f575666
--- /dev/null
+++ b/Assets/Scripts/GlobalTimer.cs
@@ -0,0 +1,269 @@
+using System;
+using Unity.Netcode;
+using UnityEngine;
+
+namespace Northbound
+{
+    /// <summary>
+    /// 전역 타이머 - 주기적으로 반복되며 모든 클라이언트에 동기화
+    /// </summary>
+    public class GlobalTimer : NetworkBehaviour
+    {
+        public static GlobalTimer Instance { get; private set; }
+
+        [Header("Timer Settings")]
+        public float cycleLength = 60f; // 한 주기 길이 (초)
+        public bool autoStart = true;
+        public bool pauseOnZero = false; // 0에 도달하면 일시정지
+
+        [Header("Debug")]
+        public bool showDebugLogs = false;
+
+        // 현재 타이머 값 (초)
+        private NetworkVariable<float> _currentTime = new NetworkVariable<float>(
+            0f,
+            NetworkVariableReadPermission.Everyone,
+            NetworkVariableWritePermission.Server
+        );
+
+        // 타이머 실행 중 여부
+        private NetworkVariable<bool> _isRunning = new NetworkVariable<bool>(
+            false,
+            NetworkVariableReadPermission.Everyone,
+            NetworkVariableWritePermission.Server
+        );
+
+        // 현재 사이클 번호
+        private NetworkVariable<int> _cycleCount = new NetworkVariable<int>(
+            0,
+            NetworkVariableReadPermission.Everyone,
+            NetworkVariableWritePermission.Server
+        );
+
+        // 이벤트
+        public event Action<float> OnTimerTick;           // 매 프레임 업데이트
+        public event Action OnCycleComplete;              // 사이클 완료
+        public event Action<int> OnCycleStart;            // 새 사이클 시작
+        public event Action<float> OnHalfwayPoint;        // 사이클 중간 지점
+
+        private bool _hasReachedHalfway;
+
+        private void Awake()
+        {
+            if (Instance != null && Instance != this)
+            {
+                Destroy(gameObject);
+                return;
+            }
+            Instance = this;
+        }
+
+        public override void OnNetworkSpawn()
+        {
+            base.OnNetworkSpawn();
+
+            if (IsServer && autoStart)
+            {
+                StartTimer();
+            }
+
+            // 클라이언트도 이벤트 수신을 위해 변경 감지
+            _currentTime.OnValueChanged += OnCurrentTimeChanged;
+        }
+
+        public override void OnNetworkDespawn()
+        {
+            _currentTime.OnValueChanged -= OnCurrentTimeChanged;
+        }
+
+        private void Update()
+        {
+            if (!IsServer || !_isRunning.Value)
+                return;
+
+            _currentTime.Value -= Time.deltaTime;
+
+            // 중간 지점 체크
+            if (!_hasReachedHalfway && _currentTime.Value <= cycleLength / 2f)
+            {
+                _hasReachedHalfway = true;
+                OnHalfwayPoint?.Invoke(cycleLength / 2f);
+                NotifyHalfwayClientRpc();
+                
+                if (showDebugLogs)
+                    Debug.Log($"<color=yellow>[GlobalTimer] 사이클 중간 지점 도달</color>");
+            }
+
+            // 사이클 완료
+            if (_currentTime.Value <= 0f)
+            {
+                CompleteCycle();
+            }
+
+            OnTimerTick?.Invoke(_currentTime.Value);
+        }
+
+        private void CompleteCycle()
+        {
+            OnCycleComplete?.Invoke();
+            NotifyCycleCompleteClientRpc();
+
+            if (showDebugLogs)
+                Debug.Log($"<color=green>[GlobalTimer] 사이클 {_cycleCount.Value} 완료</color>");
+
+            if (pauseOnZero)
+            {
+                _isRunning.Value = false;
+                _currentTime.Value = 0f;
+            }
+            else
+            {
+                // 다음 사이클 시작
+                _currentTime.Value = cycleLength;
+                _cycleCount.Value++;
+                _hasReachedHalfway = false;
+
+                OnCycleStart?.Invoke(_cycleCount.Value);
+                NotifyCycleStartClientRpc(_cycleCount.Value);
+
+                if (showDebugLogs)
+                    Debug.Log($"<color=cyan>[GlobalTimer] 사이클 {_cycleCount.Value} 시작</color>");
+            }
+        }
+
+        private void OnCurrentTimeChanged(float previousValue, float newValue)
+        {
+            // 클라이언트에서도 Tick 이벤트 발생
+            if (!IsServer)
+            {
+                OnTimerTick?.Invoke(newValue);
+            }
+        }
+
+        #region Public API
+
+        /// <summary>
+        /// 타이머 시작 (서버만)
+        /// </summary>
+        public void StartTimer()
+        {
+            if (!IsServer) return;
+
+            _currentTime.Value = cycleLength;
+            _isRunning.Value = true;
+            _cycleCount.Value = 1;
+            _hasReachedHalfway = false;
+
+            OnCycleStart?.Invoke(_cycleCount.Value);
+            NotifyCycleStartClientRpc(_cycleCount.Value);
+
+            if (showDebugLogs)
+                Debug.Log($"<color=green>[GlobalTimer] 타이머 시작: {cycleLength}초</color>");
+        }
+
+        /// <summary>
+        /// 타이머 일시정지 (서버만)
+        /// </summary>
+        public void PauseTimer()
+        {
+            if (!IsServer) return;
+
+            _isRunning.Value = false;
+
+            if (showDebugLogs)
+                Debug.Log($"<color=yellow>[GlobalTimer] 타이머 일시정지</color>");
+        }
+
+        /// <summary>
+        /// 타이머 재개 (서버만)
+        /// </summary>
+        public void ResumeTimer()
+        {
+            if (!IsServer) return;
+
+            _isRunning.Value = true;
+
+            if (showDebugLogs)
+                Debug.Log($"<color=green>[GlobalTimer] 타이머 재개</color>");
+        }
+
+        /// <summary>
+        /// 타이머 리셋 (서버만)
+        /// </summary>
+        public void ResetTimer()
+        {
+            if (!IsServer) return;
+
+            _currentTime.Value = cycleLength;
+            _cycleCount.Value = 0;
+            _isRunning.Value = false;
+            _hasReachedHalfway = false;
+
+            if (showDebugLogs)
+                Debug.Log($"<color=yellow>[GlobalTimer] 타이머 리셋</color>");
+        }
+
+        /// <summary>
+        /// 현재 남은 시간 (초)
+        /// </summary>
+        public float GetCurrentTime() => _currentTime.Value;
+
+        /// <summary>
+        /// 현재 남은 시간 (분:초 형식)
+        /// </summary>
+        public string GetFormattedTime()
+        {
+            int minutes = Mathf.FloorToInt(_currentTime.Value / 60f);
+            int seconds = Mathf.FloorToInt(_currentTime.Value % 60f);
+            return $"{minutes:00}:{seconds:00}";
+        }
+
+        /// <summary>
+        /// 진행률 (0.0 ~ 1.0)
+        /// </summary>
+        public float GetProgress() => 1f - (_currentTime.Value / cycleLength);
+
+        /// <summary>
+        /// 현재 사이클 번호
+        /// </summary>
+        public int GetCycleCount() => _cycleCount.Value;
+
+        /// <summary>
+        /// 타이머 실행 중 여부
+        /// </summary>
+        public bool IsRunning() => _isRunning.Value;
+
+        #endregion
+
+        #region Client RPCs
+
+        [ClientRpc]
+        private void NotifyCycleCompleteClientRpc()
+        {
+            if (!IsServer)
+            {
+                OnCycleComplete?.Invoke();
+            }
+        }
+
+        [ClientRpc]
+        private void NotifyCycleStartClientRpc(int cycleNumber)
+        {
+            if (!IsServer)
+            {
+                OnCycleStart?.Invoke(cycleNumber);
+            }
+        }
+
+        [ClientRpc]
+        private void NotifyHalfwayClientRpc()
+        {
+            if (!IsServer)
+            {
+                OnHalfwayPoint?.Invoke(cycleLength / 2f);
+            }
+        }
+
+        #endregion
+    }
+}
\ No newline at end of file
diff --git a/Assets/Scripts/GlobalTimer.cs.meta b/Assets/Scripts/GlobalTimer.cs.meta
new file mode 100644
index 0000000..b1ee10d
--- /dev/null
+++ b/Assets/Scripts/GlobalTimer.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: b643f7c446ade3f448e57e7501ac5a67
\ No newline at end of file