The multimedia terminal technology mainly includes three parts: the software and hardware platform technology to realize the transformation, compression, synchronization and synthesis of the information represented by various media, the interface technology between the multimedia terminal system and the communication network, and the man-machine interface technology. With the continuous progress of technology, multimedia terminal systems will evolve from narrowband and primary systems to broadband and intelligent systems. This kind of multimedia terminal system and broadband intelligent personalized integrated service digital network will become the basic characteristics of the 21st century communication technology, and will provide social users with increasingly perfect and increasingly rich communication services to meet the diverse communication needs of society.