diff --git a/README.en.md b/README.en.md
index 229180f6c7d8e77968b76b58420c3e26e5786414..741cdcd71e63d7e738d192d936ba3161707d9f64 100644
--- a/README.en.md
+++ b/README.en.md
@@ -16,6 +16,8 @@ This codelab gives an example of ArkTS declarative development, introducing how
 **ohos.permission.INTERNET**, required for accessing online web pages.
 
 ## How to Use
+#### Preview device description
+The previewer does not support previewing web components. Please run it on a real machine.
 
 #### Server setup process
 
diff --git a/README.md b/README.md
index c3b6fea06024b0a92fa3154d3b28261b7ebf1e76..e9a071b18a2024eafd2efc17e63d34028c99624a 100755
--- a/README.md
+++ b/README.md
@@ -16,6 +16,8 @@
 访问在线网页时需添加网络权限：ohos.permission.INTERNET。
 
 ## 使用说明
+#### 预览器说明
+预览器不支持预览Web组件，请使用真机运行。
 
 #### 服务端搭建流程