Underground cable detection system

The invention provides an underground cable detection system. A sensor group and an image acquisition device mounted in a detection robot which is in communication connection with a detection server are used for detecting and checking a cable tunnel paved underground or an underground cable in a cable groove; compared with the prior art that the cable tunnel paved underground or the underground cable in the cable groove is detected and checked through manpower, a worker only needs to send out an instruction to the detection robot through the detection server, and the cable tunnel paved underground or the underground cable in the cable groove can be detected and checked through the detection robot; the underground cable can be detected and checked without the need of manual operation, so that faults of the underground cable are simple to seek, and fault points are very easy to determine; and the seeking efficiency of the faults of the underground cable is improved.