diff --git a/zh-cn/application-dev/reference/apis/js-apis-colorSpaceManager.md b/zh-cn/application-dev/reference/apis/js-apis-colorSpaceManager.md
index 0f881ebc86ce35fbf5b026f6714b627580a3afbd..c896b592a71783d9d83431e2d7c95dadefde9099 100644
--- a/zh-cn/application-dev/reference/apis/js-apis-colorSpaceManager.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-colorSpaceManager.md
@@ -142,7 +142,7 @@ getColorSpaceName(): ColorSpace
 
 ```js
 try {
-    let csType = colorSpace.getColorSpaceName();
+    colorSpace.getColorSpaceName();
 } catch (err) {
     console.log(`Fail to get colorSpace's name. Cause: ` + JSON.stringify(err));
 }
@@ -166,7 +166,7 @@ getWhitePoint(): Array\<number\>
 
 ```js
 try {
-    let wp = colorSpace.getWhitePoint();
+    colorSpace.getWhitePoint();
 } catch (err) {
     console.log(`Failed to get white point. Cause: ` + JSON.stringify(err));
 }
@@ -190,9 +190,8 @@ getGamma(): number
 
 ```js
 try {
-    let gamma = colorSpace.getGamma();
+    colorSpace.getGamma();
 } catch (err) {
     console.log(`Failed to get gamma. Cause: ` + JSON.stringify(err));
 }
-```
-
+```
\ No newline at end of file