The Energy Management System (EMS) is a highly integrated cloud-based software platform for energy storage system management. Leveraging advanced technologies such as artificial intelligence and big data, and centered around energy storage, it constructs a friendly interactive platform that integrates energy access, operation monitoring, operation management, smart dispatching, energy consumption, AI and big data analysis, intelligent operation and maintenance, and economic analysis. The combination of an energy storage system and a photovoltaic power generation system can effectively compensate for and mitigate the randomness, intermittency and instability of PV power generation, playing an important role in improving PV power quality, assisting grid peak shaving, smoothing power output, and enhancing grid stability. The significance of EMS lies in its ability to guide the charging and discharging of the energy storage system in an orderly manner, optimize the charge/discharge control strategy, and fulfill the important functions of energy storage in energy production and consumption as a transfer hub, matching unit and optimizer. At the same time, the integrated solar-plus-storage EMS can accept grid dispatch commands and optimize the overall control strategy. Furthermore, the energy storage system can play a vital role in energy production and consumption as a “transfer hub, matching unit and optimizer”, supporting stable, safe and reliable grid operation and promoting the healthy development of the renewable energy industry.