In the era of information, the development of multi media systems for audio-visual education and it`s dynamic operations are demanded very highly. In this study, a system is made of a personal computer and a viewer project pannel with an OHP. An OHP system interfaced with personal computer can be controlled efficiently by computer program. This system has both the merits of personal system and OHP as followings. It enables us to save much time and efforts in preparing OHP data. We don`t have to make further troublesome TP teaching materials. All of the OHP teaching materials can be made easily into a file by pressing the keys on the computer. A number of OHP instructional files can be saved in only one floppy diskette. There is much more convenience in various respects, for instance in copying, modifying, handling the PC files than TP films. Time in accessing of the data is shorter. Many CAI coursewares developed can be used as OHP data. A database is able to builded up for an OHP in this system.