Abstract: It is an inevitable trend for power grid upgrading and development to build a new type power system with new energy as the main body under the goal of carbon neutrality and carbon emissions peak. With the construction and development of new type power system, power electronic, energy storage and other new type power devices will be widely used, and the requirements of power grid for flexibility, controllability, safety and stability are becoming higher and higher. Ensuring the reliable operation of power equipment is facing great challenges. The main features and technical framework of optimal operation and intelligent maintenance of power equipment are described under the background of new type power system. The research status and progress of key technologies of equipment operation and maintenance supporting new type power system, such as digitalization and intellectualization of power equipment, state perception of new type power grid equipment, and efficient optimal operation of power equipment, are elaborated in detail, and the main problems to be solved in the research and application are discussed. Finally, prospects in the future mode and technology development trends of power equipment operation and maintenance are put forward.