This paper introduces the basic concept of workflow technology, analyzed the business flow of highway construction project management based on thorough investigate, advanced the architecture of highway construction project management system based on workflow, and the function of each part of the system are provided. The link-procedure between different data-base is also designed. Eventually, the article advanced a new concept-FlowMIS, and programmed an antetype system. Now, the system has been realized and applied in actual project and achieved good results.