Research conclusions ： This paper proposes that supervision enterprises should properly implement the IS09001 quality assurance system and all staff members should deeply understand its theoretical basis - the connotation of the " 8 management principles" with self - consciousness enhanced in carrying out the international standards. It also sums up that the using of closed-cycle management type of PDCA enables supervision enterprises to intensify the control procedure instead of being formalistic. By taking seriously the evaluations on management, the supervision quality can be improved with economic benefit and public reputation upgraded as well.