Group Technique (GT) and Computer Integrated Manufacturing (CIM) are the technique and method used to put an end to the backward traditional manufacturing way which is characterized by variety and small hatch In this paper, the relation between these two techniques, and the following ideas are expounded. GT becomes the base of CIMS by Simplifying the system; developing GT system with CIM idea, we can not only acquire short-term benefit, but also establish CIM system on the basis of GT system with the improvement of computer application in enterprises. At the end of this paper, the authors discuss the relation between GT system and CIM system which are now being carried out and planned respectively in a concrete factory