A wheeled negative pressure adsorption climbing robot carrying a high definition camera and a far distance wireless transmitter moves smoothly on the nuclear power plant containment wall. When the robot moves on the containment wall, the camera fixed on the robot sent the wall video information back to the receiver at the bottom of the containment wirelessly, then the receiver transfers the video information to the local PC. The video will be analyzed, processed and displayed by the monitoring and measuring processing software system installed on the PC, and then the image which contains defect information will be transferred to the defect measure module for defect measuring. Finally the defect information and the corresponding image will be stored into the backstage database. This is quite convenient for online and offline browsing to check and monitoring dynamic change of the containment defect.