Industrial users have great economic and reliability requirements for the application of microgrid. The uncertainty of renewable energy power generation and the loss caused by the charging and discharging of energy storage battery in dispatching affect the economy of microgrid; At the same time, the general microgrid system has no standby energy storage, which affects the reliability of microgrid. In order to solve these problems, A group energy storage control strategy for industrial microgrid system was proposed. The energy storage is divided into three groups for optimal scheduling respectively, which reduces the impact of the uncertainty of renewable energy generation on the microgrid, reduces the charging and discharging times of energy storage battery, improves the economy, and extends the power supply time of microgrid to important loads in case of power failure, take the reliability of microgrid into account. Finally, simulation analysis based on MATLAB platform verify the rationality and effectiveness of the strategy.