1. A robot system, comprising:
an intrusion detector which detects that a person has entered into a monitoring area established around a robot;
an installation table which has an upper surface and a side surface, and supports the robot;
a light emitting device which brightens the side surface of the installation table; and
a control device which receives a signal outputted by the intrusion detector and controls the light emitting device, wherein
the upper surface of the installation table is a working surface for workpieces, and
the control device is configured to cause the light emitting device to emit light when it is detected that the person has
entered into the monitoring area.