Abstract: As power systems are under the transit from the traditional to the new forms, pumped storage is rapidly developed and constructed to meet the increasing regulation capacity demand. Large-scale pumped storage will become a significant structural feature of new power systems, alongside with high-proportion new energy sources. This paper examines the current status and future trends of domestic and foreign pumped storage projects. It analyzes the characteristics, scenarios, and pumped storage requirements of the new type of power system. The paper also reviews the research progress in large-scale pumped storage optimization and its participation in power system stability control. Finally, this paper proposes the coordinated participation of large-scale pumped storage in optimal scheduling and stability control. This research aims to provide guidance for the development of pumped storage and its integration into new types of power systems.