This dissertation studies the Multimedia Message Services that based on the digital television system, and it is called TVMMS for short. The author discusses the TVMMS architecture, and specifies the address number distributed for every entity and addressing scheme. The TVMMS can perform the following functions: point to point communication between STB, communication between STB (Set Top Box) and VASP (Value Added Services Provider), communication between STB and mobile telephone, communication between STB and TV station. So, TVMMS will greatly enrich the application of digital television.