Abstract: Digital and intelligent upgrade of energy industry, Intelligent Power Plant Operation and Maintenance 3D visualization is an important development direction. This paper briefly describes the relationship between 3D visualization and intelligent power plant operation and maintenance, and introduces the application of 3D visualization in domestic power plant operation and maintenance. This paper introduces the architecture and function application of 3D visualization platform, and describes the development trend of business combination of 3D visualization and digital twin in intelligent power plant.