In this paper, according to the experience in education,research and products design, the writer summarized the following conclusions:modern machinery is developing towards of extreme manufacturing, integration, information and in the guidance of scientific development concept. Machinery science should research around the weaker links of the machinery product and according to the national requirement. One main content of developing strategy is the new methods, new theory and new technology which are being researched in the world. Product design methods directly affect the product total quality in the process of product research and development. We should intensify the integration of macroscopical research and microcosmic research so that we can have greater breakthrough in the design theory and method research.