Abstract: For the usability problems of innovation product design, it put forward the coupling theory from the angle of user centered design, and analyzed the multifield coupling relationship between designers and users in function coupling, manmachine coupling and information coupling, which exists in the product innovation design. Through analyzing the transformation of the user's cognitive psychology into the designer's psychology, it elaborated the basic thought of using the knowledge coupling method to obtain the multifield coupling relationship. Lastly, it discussed the relationship between coupling theory and microscopic innovative methods (such as Quality Function Deployment，QFD) in the designing process.

Key words: innovative design; coupling theory; knowledge coupling