Safety protection for electric power high-altitude operations and GIS (Gas Insulated Switchgear) operations faces challenges like high false alarm rates and poor environmental adaptability. This study constructs an intelligent protection system based on far-infrared dual-modal collaboration. By integrating 740 nm wavelength infrared rays (ASTM E2913-19) with electromagnetic sensing, the system achieves dynamic boundary perception. A three-dimensional protection network composed of three sets of adjustable-angle heads (180° ± 3°) expands the coverage to 20 m, 2.3 times that of traditional schemes. A 30 kg electromagnetic adsorption device (salt spray test ≥500 h) enables deployment within 5–12 min. In 127 multi-scenario verifications, the system demonstrated zero false alarm rate and a rapid response of ≤50 ms, outperforming traditional equipment (82.4 ms). In extreme environment tests (−25–35 ℃), system function attenuation remained below 10%. Through collaboration between the infrared fence and GIS status monitoring, the dynamic division of live areas reduced unintended entry accidents by 90%. This scheme has been successfully applied in 500 kV substations and transmission lines, providing a reliable and flexible safety model.