Abstract: As a comprehensive energy system involving with highly coupled multi-energy sources and multi-energy conversion modes, the energy management and strategy optimization of CCHP microgrid system are extremely complex. Therefore, the design of a reasonable system operation strategy for optimal scheduling is essential to enhance the economic efficiecny of the system . Based on this, in this paper we carry out an economic analysis on the operation strategies of "FTL", "FEL", mixed operations, and economic optimal operations, respectively. The results demonstrate that the economic optimal operation strategy can develop the optimal operation mode according to the different characteristics of each component, on the premise of satisfying the balance of cold, thermal and electricity loads. The system operation cost and gas turbine operation efficiency surpass those of other operation strategies.