Relying on the integrated communication-navigation-remote sensing satellite constellation of the "StarPool", this solution integrates multi-source heterogeneous data such as multi-mode remote sensing, IoT communication, navigation augmentation and intelligent IoT. It combines the digital twin technology system (fusing mechanism-driven and data-driven approaches) to build a space-air-ground-network integrated intelligent monitoring network. Through high-frequency remote sensing patrols, AI target recognition, and edge-cloud collaborative analysis, it realizes full spatio-temporal sensing, risk prediction and early warning services for the operating status of power lines, oil and gas pipelines, transportation, water conservancy facilities, etc., supporting refined operation and maintenance, efficient emergency response, and intelligent supervision.