Abstract: This paper addresses the main contents of research of CAPP(computer aided process planning) and the subject character and construction system of IE(industrial engineering),and points out that IE and CAPP are the outcome of the manufacturing industry and they develop as the manufacturing industry develops.Although they are different in measure,they have something in common in essence.Starting from rough analysis,it is investigated how IE reaches fine analysis step by step,and builds up its craftwork analyzing system from″product analysis→work process analysis→man-hour analysis→working movement analysis″.It shows that IE provides the process design of the garment industry with scientific thinking and research means and plays an important role in the basic construction of data environment and the design of system function of garment CAPP.