The invention relates to a collaborative management system based on a workflow engine. The system comprises a workflow engine, a project management subsystem, a research and development management subsystem, a budget management subsystem, a performance management subsystem, a financial management subsystem and a background setting subsystem, and the workflow engine is used for defining and creating business processes of a plurality of business systems and driving execution of the business processes and process connection among the business systems. On the basis of the workflow engine, full-process closed-loop management of all business systems such as projects, contracts, finance and performance is achieved, comprehensive budget management penetrating through the full life cycle of the projects and unified management of internal operation performance are achieved, and the problems that data is complex, multi-system crossing occurs, manual report statistics is depended, efficiency is low, and errors are likely to happen are solved.