The Rail Transit Intelligent Integrated Power Supervision System (PSCADA) is an operation and maintenance-oriented power monitoring system for metro substations. Building upon conventional power monitoring capabilities and integrated with the substation's IEC61850-based networked protection scheme, it enables dynamic visualization of protection coordination virtual terminals, secondary circuits, protection logic, and communication status in real time- achieving full visibility of the secondary system. The system also incorporates advanced application functions essential for operation and maintenance, including protection information management, fault waveform recording, remote maintenance, and intelligent alarm analysis. These features assist maintenance personnel in quickly accessing fault information and locating issues remotely. Clear and visible secondary equipment management not only provides real-time insight into device operational status but also redefines secondary equipment inspection, fault troubleshooting, and repair operations.