The popular education usually emphasizes the function of teaching in school and belittles the importance of practicing and experimenting in today's education. This paper discusses some problems of a new intranet-based multimedia education platform, analyzes the principle of intranet-based multimedia education platform, and discusses the educational style based on the intranet-based multimedia education platform and so on. The paper mainly proposes and studies some problems, such as structure of platform, design of base communication module, design of control commands and implement of CAI multicasting, etc. The infrastructure of platform is proposed and implemented at last.