On the basis of the construction experience of several intelligent substation projects, CYG Sunri has fully analyzed the pain points and difficulties in the construction of intelligent operation and maintenance system, creatively explored and implemented the scheme based on the needs of operation and maintenance system; Secondary equipment online monitoring, 3D digital twinning, self-controllable equipment, self-produced complete set of primary equipment online monitoring, LORA online monitoring terminal based on IoT, parallel + silent intelligent patrol based on AI technology, 5G pilot application and other new technologies and products have been introduced.