In the electricity distribution and sales business, the big data management platform of POWER+ cloud platform is an important technical means to realize the intelligent energy services. By mastering the energy consumption of customers and integrating with the local energy environment, we developed the energy distribution plan with the highest utilization efficiency and most friendly to the environment, so as to solve the energy consumption problems of customers and even the local area. We established and developed the big data management platform to realize the efficient use of energy, reduce the energy cost of enterprises, and improve the level and quality of energy services. In the preliminary design of a park micro-grid project, we planned a multi-energy complementary energy supply system, including new energy sources such as the combined cooling, heating and power supply (CCHP) of natural gas, photovoltaic roof and micro-wind turbines to realize clean and efficient energy supply for the park; Meanwhile, we will design and develop “POWER+” micro-grid information management service platform, multi-energy complementary coordination and optimization scheduling, distributed energy management system, integrated energy storage management system, demand-side integrated management control system, and electricity sales and multi-energy trading system, so as to realize the electricity trading between micro-grid and large grid and between energy supplier and demander in the park, the intelligent control of energy supply in the park and demand-side management of load in the park.