Repair welding system, repair welding method, inspection device, and robot control device

A repair welding system comprising:

• an inspection device configured to inspect an appearance of a welded portion of a workpiece;
• and
• a robot control device that controls a robot configured to weld the workpiece,
• wherein the inspection device determines whether there is a defective portion among welded portions of the workpiece based on a predetermined standard, and sets one of a plurality of defect ranks to the defective portion in a case that the defective portion is detected, the plurality of defect ranks including at least two defect ranks having respectively corresponding repair welding programs for the robot to execute repair welding;
• and
• wherein the robot control device generates the repair welding program corresponding to the defect rank, and instructs the robot to execute, in accordance with the repair welding program, a repair welding on the defective portion to which the defect rank is set.