In digital TV, using a two-way information transmission technology, increase the ability of interaction with TV many new functions, so that people can get all kinds of network services according to their own needs, including new video on demand, online shopping, remote education, remote medical services, so that TV has become the information appliance worthy of the name of the.

The most important service provided by digital TV is video on demand (VOD). VOD is a new TV program, it is not like the traditional TV, users can only passively watching television programs, it provides more freedom, more options, stronger interaction, the need to pass the user, the user's point of view, to effectively improve the program participatory, interactive, targeted. Therefore, it can be predicted that the future direction of the development of television is the direction of the development of on-demand mode. Digital TV also provides other services, including data transfer, teletext, Internet services, etc.. Users can use the reality of stock trading, information query, surfing the Internet and so on, so that the TV has been given a new purpose, the expansion of the function of the TV, the TV from a closed window into a communication window.