Now in the summary information in the context of the development of information technology has been widely used, a multimedia computer with each passing day, Multimedia functions are becoming more and more powerful. Multimedia is also increasingly close to the door of my life, the life and work of my door with a lot of help. CAI is a new type of modern teaching methods and in other fields of science to be a good application. In the field of automatic control, in response to the "detection" This class and the development of the plan, and text multimedia CAI have not. Therefore, it is necessary to develop such a courseware to this class for computer-aided teaching. PowerPoint is used in the software for electronic presentations, It could produce a text multimedia works, but can make some simple animation. in the projector or a computer display, as applied to a wider sphere. This multimedia courseware can fully mobilize the active participation of students, significantly enhancing the quality of the demonstration, efficiency and students of the courses enthusiasm. Keywords : Detection Technology PowerPoint CAI