diff --git a/readme.md b/readme.md
index 6c1def8..9080a2f 100644
--- a/readme.md
+++ b/readme.md
@@ -98,6 +98,8 @@ document.addEventListener("MediaPicker.CompressVideoEvent", function(data) {
 ### takePhoto 拍照 
 demo.js **takePhoto** code:
 
+please add : cordova plugin add cordova-plugin-camera
+
 cameraOptions docs: https://cordova.apache.org/docs/en/latest/reference/cordova-plugin-camera/index.html#camera
 ```
 //please add : cordova plugin add cordova-plugin-camera