Abstract: A CIMS which is composed of four-level computer system realizaed CAD,CAM, CAPP and CAPM corresponding to the system is concluded. With the help of computer system and integrated ability of technology and facility, and also based on CAD/CAM,FMS is achieved to ensure that the order requirement of each customer can be satisfied during the process of mass production. MRP-Ⅱ in this system has programmed the material supply of former section based on the principle ‘Just in time’. This system is still marching for higher level of CIMS.