In order to consider the environmental cost generated by the operation of the combined cooling, heating and power integrated energy microgrid and analyze the impact of the capacity of the energy storage device on the operating cost of the system, an optimized operation model of the combined cooling, heating and power integrated energy microgrid including environmental costs and energy storage devices is established. With the minimum total system cost as the goal, the mixed integer programming method is used to solve the problem in Cplex, and the operating cost of the corresponding traditional distribution system is compared to verify the validity of the model. The operating costs of the combined cooling, heating and power system under different electricity price modes and the impact of different capacities of energy storage devices on the operating costs of the system are analyzed. It’s concluded that the operating cost of system is the smallest under the real time electricity price mode, and the operating cost of the system increases frist and then decreases with the increase of the capacity of the energy storage device.