The invention provides a user side distributed energy storage system economy evaluation system. The system is based on equipment engineering parameters of energy storage, financial information parameters and mode income parameters of the project. The system integrates multiple applicable modes, project economy process result calculation is performed to obtain income and expenditure data of each year in the project life cycle, and then the process result is utilized to obtain a final economy evaluation index of the user-side distributed energy storage system, so that the economy of the energy storage system is scientifically, reasonably and accurately evaluated, and investment decision making by project construction related parties is facilitated.