Recently many drain pipes used for transportation of water and gas at the plants have become old. These pipes have many defects caused by corrosion and cracking and they cause serious accidents because of leakage, fire and blasts. Therefore, to forestall these accidents, we believe it is important to do drain pipe inspections and maintenance using drain pipe inspection robots. 'Rotating probe' and 'Image processing' are used for the method of inspecting pipe in this research. Then, the development of the Pipe Inspection Robot measures the irregularity and the form of the defect in pipe. Therefore, this robot using the rotating probe of this touch sensor is profitable.