Using esp8266 instead of xbee
I want to ask a question. 


You don't need to tell us.


  Can i communicate 2 esp module like xbee ?


You can make two ESP8266 modules talk together, yes. It's not "simple" like an XBee, since you have a generic WiFi network interface, so there's many many different ways of doing it. Typically one would be running as a WiFi Access Point (SoftAP) and the other would connect to it. Then you'd run some "server" code on one module (typically the SoftAP one) and the other acts as a client and connects to it (or sends data to it).