Distributed integrated energy microgrid has the typical characteristics of cold/heat/electricity/gas multi energy coupling. How to optimize the operation of the combined cooling, heat and power supply and a variety of energy storage equipment has been one of the key and difficult research work at this stage. In this paper, the model of energy storage equipment and combined cooling heating and power(CCHP) system are established, which are based on the constraints of balance equation of electricity/cooling/heating and flue gas waste heat utilization, charge and discharge of energy storage equipment, upper and lower limits of each equipment in the system, the comprehensive operation optimization objective is operation economy and total CO₂ emission in one operation cycle by configuring weight coefficient. A typical scenario of a university town is constructed, taking the cold storage equipment as an example, the capacity of energy storage equipment are 0 MW, 2 MW, 4 MW, and the influence of energy storage capacity on the operation optimization of distributed energy microgrid is analyzed. With the appropriate capacity of energy storage equipment, the lower the comprehensive operation optimization goal in a cycle, the better the requirements of economy and environmental protection can be considered.