Network attack and defense experiments have always been the important practices in courses of network security. As the Internet is not a target of network attack and defense in experiments, a virtual network environment for attack and defense is needed. In this paper, we propose a network attack and defense experimental platform based on the virtual honey net. Network attacker is formed by a number of hosts. Network defender is formed by the system of a virtual honey net. Using data capture and data control functions of the honey net, we can analyze the tools, methods, and techniques used by intruders.