The Cable Trench Inspection Robot is a compact, track-driven patrol device for real-time monitoring of cable trenches. Integrated gas, temperature/humidity and panoramic camera sensors detect toxic/combustible gases, humidity and physical defects, transmitting data to a mobile terminal within about 50 m. Weighing about 5 kg with IP68 protection and obstacle-climbing capability, it solves the low-efficiency, error-prone manual inspection of underground cable channels and enables long-term data recording and trend analysis.