The micro-energy network (MEN) can realize multiple energy coupling on the user side, which helps to improve the utilization efficiency of terminal energy and the proportion of new energy consumption. This paper takes the typical cooling, heating and electricity MEN as the research object which is built by photovoltaic, wind turbine, CHP (combined heating and power), P2G (power to gas), gas boiler, electricity and absorption refrigerator, battery, etc. The multi-objective optimization configuration of key equipment capacity of MEN including P2G is studied with the goal of minimum life cycle cost and minimum annual CO2 emission, considering the impact of power load demand side response. The results prove the effectiveness of the multi-objective planning model and realize the flexible regulation of the electric load through the demand side response, so that the load is more matched with the electricity price, energy production and consumption; At the same time, the demand side response can reduce the economic cost and CO2 emissions of the MEN planning and promote the integration of renewable energy.