Various types of audio & visual media, for their difference on attribute, they play different role for instructions. The combination of computer technology and audio-visual media is a trend of development on information. By making use of the Computer-Assisted Instruction to improve the quality of instructions and to increase the instructional effect is a new fashion. In ear1y stage, the Computer-Assisted Instruction is limited by the skills of software and hardware, and it adopts the linear design for a dull and boring presentation without any interesting. However, following the integrated combination of multi-information implemented by the computer technology, such as: sound, light, screen, and image, etc. to satisfy the human beings' audio & visual demand, so that it lets the role of learner become the real actor. This makes the Computer-Assisted Instruction have a new meaning. This article is to overview the meaning, content, and location of Computer-Assisted Instruction and realize its role and function among the instructions. By means of the research on learning idea, po1icy implementation, and teaching mode to analyze the limitation and suggestion on its application for geographical instructions.