In order to help the designer collect relative materials from expanding Internet, a product innovation design knowledge acquisition system based on MAS has been developed. Information on the Internet can be divided into structured data, non-structured data and semi-structured data, and two different acquisition processes from different sources were established. Based on aforementioned, the framework of the system was established with federal system of MAS. Layered structure feature was applied in each internal federal system. Finally, the development environment was selected, and three-tier B/S architecture was adopted. Each function modules with system were fulfilled by programming.