(With the development of computer network technology and the countless social influences it brings, network communication has become a hot spot that the society pays attention to. Network communication from technology to use is not only the Internet, but also includes mobile communication, the digitization of traditional communication networks (such as radio and television networks, cable TV networks) and the digitization of traditional media. This book absorbs the research effects of related network communication of communication researchers at home and abroad since the 1990s, and combines the research results.)