diff --git a/jsk_data/README.md b/jsk_data/README.md
index 471943be2..121c57893 100644
--- a/jsk_data/README.md
+++ b/jsk_data/README.md
@@ -13,7 +13,7 @@ this is fully designed for JSK lab members.
 
 There are following sub commands. See `jsk_data [sub command] --help` for more detail.
 
-* `ls`: List data in the server.
+* `ls`: List data on the server.
 
     Usage is `jsk_data ls [OPTIONS] [QUERY]`.
 
@@ -28,6 +28,12 @@ There are following sub commands. See `jsk_data [sub command] --help` for more d
     [public Google Drive folder](https://drive.google.com/folderview?id=0B9P1L--7Wd2vUGplQkVLTFBWcFE),
     so please care about it when you handle secure data.
 
+* `delete`: Delete file on the server.
+
+    Usage is `jsk_data delete FILENAME`.
+    It only supports with `--public` option.
+    If you want to delete private data, delete it manually by logging in aries via ssh.
+
 * `pubinfo`: Show public data info.
 
     Usage is `jsk_data pubinfo [OPTIONS] FILENAME`.
@@ -35,6 +41,10 @@ There are following sub commands. See `jsk_data [sub command] --help` for more d
     (see [here](http://stackoverflow.com/questions/25010369/wget-curl-large-file-from-google-drive))
     Please run `sudo pip install gdown` and use it at that time. (`Usage: gdown [URL] -O [FILENAME]`)
 
+* `pubopen`: Open Google Drive Folder where public data is uploaded
+
+    Usage is `jsk_data pubopen`.
+
 
 **Screencast**