diff --git a/source/app/task_keystatus.c b/source/app/task_keystatus.c
index c3e34e0..5f62a50 100644
--- a/source/app/task_keystatus.c
+++ b/source/app/task_keystatus.c
@@ -80,7 +80,7 @@ void L3_task_keystatus_handler(S_TASK_KEYSTATUS *s)
 				}				         
 			}
 		}
-		if (L2_ReadKey1() == Key_Down)
+		else if (L2_ReadKey1() == Key_Down)
 		{
 			if (s->Key1_handled == 0)
 			{
@@ -88,7 +88,7 @@ void L3_task_keystatus_handler(S_TASK_KEYSTATUS *s)
 				L2_WT2605B_VioceUp();	// 音量增加
 			} 
 		}
-		if (L2_ReadKey2() == Key_Down)
+		else if (L2_ReadKey2() == Key_Down)
 		{
 			if (s->Key2_handled == 0)
 			{