diff --git a/README.md b/README.md
index 669c70e..81ab8f5 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,124 @@
 # todo-ddl
 Todo CLI with DDLs on nodejs.
+
+
+## Architecture
+
+### overview
+
+```js
+|todo-ddl
+|
+|---config
+|   |---email
+|   |---remote url
+|
+|---td
+|   |---todo
+|   |---task
+|   |---history
+|
+|---ddl
+|
+|---log
+|
+
+```
+
+### td structure
+
+```js
+
+td new        td add        td done
+------>      -------->     --------->
+        todo          task           history
+<------     <--------      <---------
+  td rm       td return      td recover
+
+```
+
+
+
+
+## Commands
+
+### config set
++ `td config [-e email] [-r remote]`: Set 
+
+
+### td set
+
++ `td new <name> [class]`: Create new todo..
++ `td add <id>`: Add todo to task..
++ `td done <id>`: Finish task..
++ `td recover`: Recover task from history..
++ `td return <id>`: Return task to todo..
++ `td rm <id>`: Remove task..
+
++ `td ls`: List tasks..
++ `td lt`: List todos..
++ `td history`: List history
+
+### log set
+
++ `td select <id>`: Select task for loging..
++ `td log <comment>`: Record logs..
++ `td ll`: List logs..
++ `td rml <id>`: Remove log..
+
+### ddl set
+
++ `td newd <name> <date>`: Create new ddl..
++ `td link <ddlID> <tdID>`: Link todo with ddl..
++ `td ld`: List ddls..
++ `td rmd <id>`: Remove ddl..
+
+### systemctl
+
++ `td init`: Reset all..
++ `td push`: Push local to remote..
++ `td pull`: Pull from remote..
++ `td sync`: Sync with remote..
+
+
+## Data structure
+
+```js
+config:{
+  email: "",
+  remote: "https://api.yimian.xyz/todo-ddl/"
+}
+
+
+data:{
+  td:{[{
+    id: 'a2s3s2ds',
+    name: '',
+    class: 'default',
+    createTime: (new Date()).valueOf(),
+    todoTime: (new Date()).valueOf(),
+    endTime: (new Date()).valueOf(),
+    lastOperateTime: (new Date()).valueOf(),
+    idDel: false,
+    logs: [{
+      id: 'fdkr8ei9odleiw93',
+      content: '',
+      createTime: (new Date()).valueOf()，
+      lastOperateTime: (new Date()).valueOf(),
+      isDel: false
+    }]
+  }]},
+  
+  ddl: {[{
+    id: 'di8eio',
+    name: '',
+    class: 'default',
+    link: [<tdID>],
+    createTime: (new Date()).valueOf(),
+    expireTime: (new Date()).valueOf(),
+    lastOperateTime: (new Date()).valueOf(),
+    isDel: false
+  }]}
+}
+
+```