Developing large-scale energy storage is an important way to meet the increasing power demand and increase the consumption of renewable energy. The application of energy storage technology in power grid can delay the investment of power grid, improve the utilization rate of power grid equipment and ensure the overall stability of power grid. This paper first introduces several types of energy storage technologies suitable for large-scale development, compares and analyzes the advantages and disadvantages of these energy storage technologies, and points out several key directions for future energy storage development. By analyzing the application scenarios of large-scale energy storage in new energy consumption, the technical and economic indicators required for energy storage application are given, which provides a reference for energy storage technology research.