The invention discloses a digital television broadcasting system coordinated with a broadband communication network and an information transmission network where the digital television broadcasting system is located. The information transmission network includes a broadband communication network and the digital television broadcasting system which are used for providing information to a user terminal; the broadband communication network includes an edge server which is nearest to the user terminal; a bi-directional information channel is arranged between the user terminal and the edge server; and a broadcast information channel is respectively arranged between the digital television broadcasting system and the edge server as well as between the digital television broadcasting system and the user terminal. By means of the technical scheme of the invention, a variety of ways of network access are provided for users, and therefore, accurate, efficient and high-quality information services can be provided for the users to the greatest extent. The digital television broadcasting system that can be combined with the broadband communication network can become an information superhighway in the new era. With the digital television broadcasting system adopted, a large amount of multimedia data can be transmitted to the users rapidly and accurately in a broadcasting manner.