The invention belongs to the field of pipeline detection robots, and provides a pipeline detection robot system which is simple in circuit, good in stability and beneficial to being extended to multiple detection equipment. Electrical carrier communication systems comprising electrical carrier core boards and control panels are implanted into a cable car, a remote robot and detection equipment with the number of 1-N, and therefore the electrical carrier transmission ends of the respective electrical carrier core boards can be connected with electrical wires to form the pipeline detection robotsystem. The system is simple in circuit, good in stability and beneficial to being extended to the multiple detection equipment. In addition, the pipeline detection robot system is isolated by an electrical isolation communication module to be two stages of power supply communication systems which are separately powered by the first electrical wire and the second electrical wire and achieve mutual communication, interference of electrical transmission on communication is effectively reduced, and stability of the pipeline detection robot system is improved.