Wall-climbing quadruped robot is developed based on the Universal Vacuum Gripper (UVG). UVG is one of suction cup adhering to uneven surfaces with its deformable lip. The robot developed in the previous research has a simple structure consisting of two legs equipped with UVG and two degrees of freedom of rotation, and was able to climb uneven walls and move along the ceiling, but could not perform unattended inspections due to the limited degree of freedom. Therefore, we attached UVGs to the four legs of a quadruped robot for automatic inspections of social infrastructure. We reports the current developmental status of the wall-climbing robot.