At present, the microgrid is still in the experimental demonstration stage, has not yet been commercialized operation. It is still very limited for microgrid economy research. This paper presents some indicators including comprehensive cost, economic efficiency, reliability and environmental benefits. It takes the Shanghai University of Electric Power microgrid demonstration project which is the first school in the east of China as an example and uses the multi-objective evaluation function to make the economic evaluation. It is verified that the microgrid can attain the goal of profit in a certain period of time using this method.