Abstract: [Purposes]To meet the demand for modernized megacity governance and address traditional territorial space monitoring challenges (wide coverage,rapid changes,cumbersome supervision),this paper elaborates on key technologies and application scenarios of an integrated satellite-air-ground remote sensing monitoring system.[Methods]Based on the framework of “three-dimensional perception-intelligent driving-platform empowerment-scenario innovation”,the paper deeply integrate multi-source remote sensing data (satellite,aerial,UAV fleets).[Findings]Using multi-source heterogeneous data fusion and AI-driven intelligent interpretation,rapid full-domain response to territorial space changes is achieved.Taking Shanghai as a case,technical verifications and practical explorations are conducted in cultivated land protection,ecological security,and immovable cultural relic monitoring.[Conclusions]This method is advanced and practically applicable,providing a reference for refined urban territorial space governance and application scenario innovation nationwide.

Key words: space-air-ground integration, territorial space monitoring, multi-source remote sensing, megacity, intelligent interpretation