Abstract: Microgrids connected to the power grid can promote the use of new energy to alleviate the energy crisis and improve the environment. Therefore, this paper reviews the research status of micro-grid technology. The latest progress of micro-grid technology research is introduced from the aspects of the development status of micro-grid engineering construction at home and abroad, the research status of micro-grid technology, the development status of CCHP system engineering construction at home and abroad, the research status of CCHP technology at home and abroad, and the application of micro-grid in power market. Then the corresponding comments are given and the future development trend of “source-network-load-vehicle-storage” micro-grid is pointed out.