The container energy storage system is an integrated energy storage system developed to meet the needs of the mobile energy storage market. Its internal battery cabinet, lithium battery management system (BMS), container dynamic environment monitoring system, and energy storage converter and energy management system can be integrated according to customer needs. Container energy storage system has the characteristics of simplifying infrastructure construction cost, short construction period, high degree of modularization, convenient transportation and installation, etc. It can be applied to power stations such as thermal power, wind energy, solar energy, or other applications such as islands, communities, schools, scientific research institutions, factories, large load centers, etc.