diff --git a/command/README.md b/command/README.md
index 938b201..911ae87 100644
--- a/command/README.md
+++ b/command/README.md
@@ -2,21 +2,7 @@
 
 ##基本语法
     docker [OPTIONS] COMMAND [arg...]
-
-
-DESCRIPTION
-       docker  has  two  distinct functions. It is used for starting the Docker daemon and to run the CLI (i.e., to command the daemon to manage images, containers
-       etc.) So docker is both a server, as a daemon, and a client to the daemon, through the CLI.
-
-
-       To run the Docker daemon you do not specify any of the commands listed below but must specify the -d option.  The other options listed  below  are  for  the
-       daemon only.
-
-
-       The Docker CLI has over 30 commands. The commands are listed below and each has its own man page which explain usage and arguments.
-
-
-       To see the man page for a command run man docker .
+一般来说，docker命令可以用来管理daemon，或者通过CLI命令管理image和container。可以通过man docker来查看这些命令。
 
 
 ##选项
@@ -176,3 +162,7 @@ docker的命令可以采用`docker-CMD`或者`docker CMD`的方式执行。两
 
     docker-wait(1)
         阻塞直到一个容器终止，然后输出它的退出符
+
+##一张图总结docker的命令周期
+
+![命令周期](../images/cmd_logic.png)
diff --git a/images/cmd_logic.dot b/images/cmd_logic.dot
new file mode 100644
index 0000000..01d859d
--- /dev/null
+++ b/images/cmd_logic.dot
@@ -0,0 +1,56 @@
+//dot -Tpng xx.dot -o xx.png
+digraph G {
+    rankdir=TB;
+    fontname = "Microsoft YaHei";
+    fontsize = 14;
+    penwidth = 3;
+    compound=true;
+    rankdir=LR;
+
+    node [shape = record];
+    edge [fontname = "Arial", fontsize = 12, color="darkgreen" ];
+
+    image[label="Image",color=blue];
+    registry[label="Registry",color=blue];
+    tar[label="Tar files",color=blue];
+
+    subgraph cluster_container {
+		label = "Container";
+        style = "bold";
+        color = blue;
+        edge [fontname = "Arial", fontsize = 11, color="skyblue" ];
+		//node [style=filled];
+        run[label="Running",shape=circle, style=filled, fillcolor=green];
+        stop[label="Stopped",shape=circle, style=filled, fillcolor=red];
+        pause[label="Paused",shape=circle, style=filled, fillcolor=blue];
+
+        run->pause[label="pause"];
+        pause->run[label="unpause"];
+        run->run[label="restart"];
+        run->stop[label="kill"];
+        stop->run[label="start"];
+	}
+
+    run->image[label="commit",ltail=cluster_container];
+    image->run[label="start"];
+
+    image->tar[label="export|save"];
+    tar->image[label="import"];
+
+    image->registry[label="push"];
+    registry->image[label="pull"];
+
+    //heat[label="heat commands",color=blue];
+    //heatshell[label="heatclient.shell.HeatShell",color=blue];
+    //shell[label="{heatclient.v1.shell|+do_stack_create\l+do_stack_show\l+do_stack_update\l...\l+do_event_list\l...\l+do_resource_list\l...\l+do_resource_type_show\l...\l+do_template_show\l...\l}",color=blue];
+    //heatclient[label="heatclient.client.Client",color=blue];
+    //client[label="heatclient.v1.client.Client",color=blue];
+    //httpclient[label="heatclient.common.http.HTTPClient",color=blue];
+
+
+
+    //openstackservices[label="{OpenStack Services|+Nova\l+Neutron\l+Keystone\l...}",color=blue];
+
+    //{rank=same; image cluster_container}
+    //{rank=same; rpcproxy apimixin}
+}
diff --git a/images/cmd_logic.png b/images/cmd_logic.png
new file mode 100644
index 0000000..8812c9d
Binary files /dev/null and b/images/cmd_logic.png differ