The Higher Education Self-taught Examinations Program(STE)is a higher educational system with Chinese characteristics.The mechanism operated by higher colleges and national examination authorities has built with the development of STE.The Examination School System(ESS)is one of the core systems and the guarantee of the operation of STE.The article discuss the functions of ESS with the research of it's origin and conception.The author also analysis the problems of ESS under the mass higher education and points out how to solve these problems.The author expounds the unique traits of ESS at the same time.