diff --git a/client/pool.go b/client/pool.go
new file mode 100644
index 0000000..d0f00cd
--- /dev/null
+++ b/client/pool.go
@@ -0,0 +1,60 @@
+// Copyright 2011 Xing Xing <mikespook@gmail.com>.
+// All rights reserved.
+// Use of this source code is governed by a MIT
+// license that can be found in the LICENSE file.
+
+package client
+
+import (
+)
+
+type poolItem struct {
+
+}
+
+/* 
+The client pool
+
+usage:
+pool := client.NewPool()
+pool.Add("127.0.0.1:4730", 1)
+handle := pool.Do("ToUpper", []byte("abcdef"), JOB_LOW|JOB_BG)
+
+*/
+type Pool struct {
+}
+
+// Create a new client.
+// Connect to "addr" through "network"
+// Eg.
+//      client, err := client.New("127.0.0.1:4730")
+func NewPool() (pool *Pool) {
+}
+
+func (pool *Pool) Add(addr string, rate int) {
+    // init a poolItem with Client & rate
+}
+
+// Do the function.
+// funcname is a string with function name.
+// data is encoding to byte array.
+// flag set the job type, include running level: JOB_LOW, JOB_NORMAL, JOB_HIGH,
+// and if it is background job: JOB_BG.
+// JOB_LOW | JOB_BG means the job is running with low level in background.
+func (pool *Pool) Do(funcname string, data []byte, flag byte) (handle string, err error) {
+    // Select a job server
+}
+
+// Get job status from job server.
+// !!!Not fully tested.!!!
+func (pool *Pool) Status(handle string) {
+    //
+}
+
+// Send a something out, get the samething back.
+func (pool *Pool) Echo(data []byte) {
+}
+
+// Close
+func (client *Client) Close() (err error) {
+}