Disclosed is a system for checking corrosion or a crack of a cable using a mobile robot including a photographing unit and a nondestructive inspection unit. The system comprises: a mobile robot which is installed in a cable to be movable so that the cable penetrates the inside of the mobile robot in a longitudinal direction; and a mobile terminal which controls the mobile robot by using a wireless communication and receives data from the mobile robot. The mobile robot includes a photographing unit for photographing the surface of the cable and a nondestructive inspection unit for inspecting the inside of the cable.
