Abstract: At present, energy is facing three major problems: shortage, pollution and safety. Under the guidance of carbon peak, carbon neutralization and policy constraints, the new round of energy revolution will show four major trends. Combined with the four trends of energy development, this paper deeply analyzes the problems of traditional power system, analyzes the role and positioning of power grid in power system, and expounds the evolution direction of new power system. This paper discusses and predicts the index node, time schedule, important characteristics and evolution process of the new power system, puts forward the development roadmap of the new power system, and discusses the four supporting technical systems of the new power system, including large-scale renewable energy development, power grid peak shaving and frequency modulation, local power grid and microgrid construction, hydrogen energy and its comprehensive utilization, provides a reference for the energy and power industry to build a new power system.