diff --git a/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs b/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
index b595e94..202582c 100644
--- a/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
+++ b/Windows/CS/Framework4.0/Toprie/Toprie/Setting.cs
@@ -1452,6 +1452,12 @@ namespace JoyD.Windows.CS
         /// </summary>
         private void PicBoxTemp_MouseClick(object sender, MouseEventArgs e)
         {
+            // 如果处于温差图绘制状态，不执行任何操作（只有右击在MouseDown事件中处理退出）
+            if (_isTempDiffDrawingMode)
+            {
+                return;
+            }
+            
             // 处理右键点击 - 退出选中状态
             if (!_isDrawingMode && e.Button == MouseButtons.Right && _selectedRegionIndex != -1)
             {