Abstract: The concept of workflow management techniques was introduced to the collaborative platform which was based on Web, and the process model which was defined, analysed, and optimized by the Colored Petri Net (CPN) was applied to the task routing of the platform.The concept of collaborative design and the process model defined by the CPN will better allocate the resources, better analyse the process of the project, and better coordinate the design work among members.This collaborative platform will provide a good development environment for the collaborative design of automotive products.