The present disclosure relates to an electric power inspection robot, a system and a method for surmounting obstacles, comprising a horizontally arranged bottom plate, a row of mutually parallel chutes are arranged on the upper surface of the bottom plate, and a sliding block is arranged in each sliding groove, and the sliding block can be Driven by the horizontal linear drive component, it slides and locates along the chute, the upper part of the slider is installed with a vertical rod, and the vertical rod and the bottom plate are arranged vertically; the upper part of the vertical rod is rotated and installed with an upper roller and a lower roller, and the upper roller and the lower roller are installed. A ground wire space is formed between them, the ground wire space is used to pass through the ground wire, the lower roller is driven by the rotary drive part to realize rotation, and the upper roller can move vertically along the vertical pole and be fixed to change the size of the ground wire space. A support plate is fixed on the upper surface of the sliding block, a rod sleeve is fixed on the upper surface of the support plate, and the lower part of the vertical rod is inserted into the rod sleeve. The present disclosure is convenient for realizing the walking of the power inspection robot along the overhead ground wire and completing the inspection of the transmission line.