Abstract: An MAS-based functional and architectonic model of a collaborative 3D design system and a typically structural model of Agent were proposed according to the computer supported collaborative design (CSCD) which plays an important role in advanced manufacturing technology. The key technologies including project management, selection of collaborator in F-AHP algorithm and tasks' decomposition/assignment based on DSM method are all discussed, as well as the implementation of collaborative communication, interactive instrument and design tools. An archetypal system of collaborative 3D design is then built. The system has been experimentally implemented in an actual design process of a certain industrial product to verify its project-management-oriented function.