<p>A robot system capable of accurately measuring assembly accuracy of a workpiece formed to include a rotation shaft is provided. To implement such a robot system, a robot system (1) according to an aspect of the present embodiment includes a robot (10) and an accuracy measurement device (40). The robot (10) transfers a workpiece formed to include a rotation shaft. The accuracy measurement device (40) holds the rotation shaft of the workpiece transferred by the robot (10) to be substantially parallel to the vertical direction, and measures assembly accuracy of the workpiece while rotating the rotation shaft to rotate the whole of the workpiece.</p>
