Continuous update of new technologies like computer multimedia technology, network technique and information highway has promoted the modernization process of teaching method. Under the condition that basic campus network construction has almost finished, the construction of information-based teaching environment has become one of focuses concerned most by people, digital and intelligent development of multi-media audio-visual classroom construction has become the inevitable. As a new pattern of manifestation of intelligent multimedia classroom construction, interactive multimedia teaching is getting favored by more and more education workers.

     At the same time, how to offer face-to-face teaching style; How to recruit part-time students extensively; How to share the experience of experts and senior teachers in other regions or countries; How to make students receive excellent teachers' lecture unlimitedly in a limited space, so a classroom that can only contain a hundred people is capable of making thousands of students receive face-to-face teaching; How to make a good course get demanded at any time in a longer period of time. This series of problems need to be solved by modern multimedia video conference system.

Multi-media audiovisual technologies brought the following assistances to educational institutions: