The Power Supply Intelligent Operation & Maintenance System is an intelligent O&M management platform with big data, BIM, GIS, and Internet of Things (IoT) as its core technologies, deeply integrating AI algorithms and digital twin technology. It realizes the collection and analysis of power supply inspection and monitoring data, panoramic visualization of power supply equipment status based on BIM, full-process management of equipment O&M, equipment fault prediction and health management, reliability and risk assessment, and assisted maintenance decision-making. The system drives the transformation from traditional "scheduled maintenance" to "predictive maintenance," providing means to reduce costs and increase efficiency for railway power supply system operations.