diff --git a/AxibugEmuOnline.Client/Assets/Script/Manager/AppEmu.cs b/AxibugEmuOnline.Client/Assets/Script/Manager/AppEmu.cs
index 697bf68..42547cf 100644
--- a/AxibugEmuOnline.Client/Assets/Script/Manager/AppEmu.cs
+++ b/AxibugEmuOnline.Client/Assets/Script/Manager/AppEmu.cs
@@ -41,7 +41,7 @@ namespace AxibugEmuOnline.Client.Manager
 
         public void BeginGame(RomFile romFile)
         {
-            if (!m_emuCore.Equals(null)) return;
+            if (!m_emuCore.IsNull()) return;
 
             switch (romFile.Platform)
             {
diff --git a/AxibugEmuOnline.Client/Assets/Script/UI/InGameUI/InGameUI_LoadState.cs b/AxibugEmuOnline.Client/Assets/Script/UI/InGameUI/InGameUI_LoadState.cs
index 2c764ad..8ef1eea 100644
--- a/AxibugEmuOnline.Client/Assets/Script/UI/InGameUI/InGameUI_LoadState.cs
+++ b/AxibugEmuOnline.Client/Assets/Script/UI/InGameUI/InGameUI_LoadState.cs
@@ -15,6 +15,8 @@ namespace AxibugEmuOnline.Client
 
         public override void OnExcute()
         {
+            if (m_gameUI.IsOnline) return;
+
             object state = m_gameUI.GetQuickState();
             Stopwatch sw = Stopwatch.StartNew();
             if (state != null)
diff --git a/AxibugEmuOnline.Client/Assets/Script/UI/InGameUI/InGameUI_SaveState.cs b/AxibugEmuOnline.Client/Assets/Script/UI/InGameUI/InGameUI_SaveState.cs
index 8c00ff4..e5ffb51 100644
--- a/AxibugEmuOnline.Client/Assets/Script/UI/InGameUI/InGameUI_SaveState.cs
+++ b/AxibugEmuOnline.Client/Assets/Script/UI/InGameUI/InGameUI_SaveState.cs
@@ -19,6 +19,8 @@ namespace AxibugEmuOnline.Client
 
         public override void OnExcute()
         {
+            if (m_gameUI.IsOnline) return;
+
             Stopwatch sw = Stopwatch.StartNew();
             object state = m_gameUI.Core.GetState();
             m_gameUI.SaveQuickState(state);