Abstract: Based on the design process acted as a solution-finding process under certain constraints, and on analysis of the system engineering process, for a complex product, a system synthetic design method with ‘request-function-structure’ solution space and ‘analysis-synthesis-evaluation’ execution mechanism was presented, a basic process for system synthetic design was determined for complex product, and a synthetic design platform composed of integrated product and process models and a tool management architecture was established according to the system synthetic design method, thereby providing a uniform integrated platform for engineers, implementing the system synthetic design method, helping the engineers to organizing and coordinating the product design action with a whole system view, ensuring that all of the action in the whole product design process was performed based on the whole system, fully determining all technologies, function requests and physical structures by a uniform mean, and ensuring that the performance of the final system in a given environment can satisfy the original expectation of users.