To provide a remote-controlled robot system, the robot system reducing the effect of an earthquake at the occurrence of an earthquake and securing safety.

Each of an operation side and a diagnostic device side distant from one another is provided with operation means for operating an ultrasound diagnostic device, and on the basis of earthquake information on each region from an earthquake alarming system, remote control through the operation means on the operation side and local control through the operation means on the diagnostic device side control are switched to perform safer control.