diff --git a/README.md b/README.md
index 40a63ec..f7351ba 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,43 @@
-# OpsDev
+# A Script For NCBA MSL
+
+## What the script can do
+
+It is a boot menu as fast switch application environment and management
+
+It provided a few of feature for application management
+
+- Browse state of application 
+- Log in system as application user
+- Startup application
+- Stop applicaiton
+- Colorful UI displays
 
 ## Screenshot
 
 ![](./img/tty.gif)
 
+
+## Customized definition
+
+```bash
+# Default Group on Configuration center  
+conf_group="DEFAULT_GROUP"
+
+# Location for configuration file store while auto pull from Configuration center  
+conf_directory="/home/ncbamsl/conf/"
+
+# Configuration center's host
+conf_center_host="10.0.0.13:9084"
+
+# Communal configuration id 
+profile_common="common.properties"
+
+# Application startup script
+startup_script="${base_home}/bin/startApp-configclient.sh"
+
+# Inject script (recommend don's change it)
+inject_script=${base_home}/.inject.script
+
+# Inject profile (recommend don's change it)
+initrc=${base_home}/.injectrc
+```