Comet technique can transfer web data from a client to another in real-time, with the comet server as the message freight station. Using this technology to transfer messages has real-time and efficient advantages. In this paper, a web version real-time share drawing system is designed and implemented, according to the comet server push technology. This system support to transmit drawing information between users, and support a large number of concurrent access. The development in the client side use the flex technology and the system adopts ajax to request and send data. In the server side, system use java to develop service program, and the system is deployed on the tomcat server.