Abstract: Due to the application of the theory of artificial intelligence and knowledge engineering, the traditional system for trouble shooting has become the deep knowledge-based expert system. This expert system and expert system for machine design use the same object model, stratum structure and functional frame to make inferences of design, explore the optimization for design plan and in terms of deep knowledge to acquire causality for trouble shooting, looking for troubles of equipments and their generating reasons. Thus the two kinds of expert systems which were independently existing and proceeding in the past time can be in perfect harmony and has become the intergrative expert system for trouble shooting and machine design.