Robot system and method for transferring workpiece

摘要

A robot system 100 includes a robot hand 12, 31, 32 and a controller 6. The robot hand 12, 31, 32 includes a plurality of holders 121 configured to hold a workpiece placed on a workpiece placement stand 201 using at least one of electromagnetic force and suction force. The controller 6 is configured to control the plurality of holders 121 to hold the workpiece while controlling the plurality of holders 121 to switch between operation mode and nonoperation mode in accordance with at least one of a shape and a size of the workpiece.