Abstract: A method for creating a knowledge representation model for a product includes: systematically capturing and representing knowledge and experience generated in product design and production processes, classifying the knowledge into five aspects, namely requirement, function, behavior, structure and evolution, and transforming unstructured tacit knowledge into structured knowledge in terms of know-what, know-how and know-why. Based on the knowledge representation model and knowledge bases, the present invention can be used to guide the construction of corresponding geometric model libraries, material libraries and process libraries, etc., and then to create design big data. The present invention can also be combined with an intelligent recommendation algorithm to intelligently recommend relevant data, information and knowledge based on the design engineers' working context and tasks undertaken.