The modular structure modeling process, principles and methodology of complex integrated service oriented mechanical products are studied in this paper. The modeling methods mainly includes two aspects: first of all, based on the systematic principle (the principle which macro and micro structure combines together) and quality function deployment principle, the modular design and micro structure modeling are realized; second, based on the "physical structure network topology" mapping principle, the ISP structure is abstracted as the community structure network, and then the community network characteristics of complex ISP are analyzed to realize the macro modular structure modeling. These studies help to reveal the inter-related laws and overall characteristics of the integrated service-oriented mechanical products, which provide the guidance for product design, quality control and value added services in scientific level.