Abstract
A robot system may include a movable stand; a robot mounted on the movable stand; a working machine mounted on the movable stand at a different position from the robot; a first placement region at which a workpiece is placed before the working machine works on the workpiece; and a second placement region at which the workpiece is placed after the working machine has worked on the workpiece. The robot may include a gripper for gripping the workpiece; a first recognizer for recognizing a state of the workpiece at the first placement region; and a second recognizer for recognizing a state of the second placement region.