The rapid development of product design promotes the educational innovation of design specialty. By applying the the interdisciplinary theory, on the basis of mastering its theoretical connotation and characteristics, and taking the the current teaching reform trend and innovation goal of product design specialty into consideration, this paper discusses constructing a system with product design specialty as the core and cultivating students' practical design ability with systematic professional knowledge. It tries to overcome the problems of the traditional teaching mode of product design specialty through interdisciplinary and multi-directional methods, which allows the product design teaching system to apply the innovation and better follow the interdisciplinary development trend.