Along with the information technology and the development of mobile communication technology, people have not meet the traditional Internet communication, wireless network communication technology is applied. As a smart phone Symbian OS, provides various network operating API. As the data communication foundation, the TCP/IP protocol provides and other mainstream Symbian OS the same Socket communication mechanism. This paper mainly introduces the application of Symbian OS network development key technology, and on this basis, summarizes the main processes of Symbian network programming. Along with the information technology and the development of mobile communication technology, people have not meet the traditional Internet communication, wireless network communication technology is applied. As a smart phone Symbian OS, provides various network operating API. As the data communication foundation, the TCP/IP protocol provides and other mainstream Symbian OS the same Socket communication mechanism. This paper mainly introduces the application of Symbian OS network development key technology, and on this basis, summarizes the main processes of Symbian network programming.