The present invention provides a robot system including a robot having a plurality of move axes and a safeguard apparatus provided independently of a control system of the robot and adapted for limiting a movable range of the robot. The safeguard apparatus includes at least two individual-axis-detection external sensors configured to be respectively turned ON/OFF in response to a rotational position or a transfer position of respective at least two move axes among the plurality of move axes of the robot, and an apparatus body configured to limit a move of the robot based on a combination of ON/OFF conditions of at least two output signals obtained from the at least two individual-axis-detection external sensors.