A robot system including a master device configured to receive a manipulating instruction from an operator and transmit the received manipulating instruction as a manipulating input signal, a plurality of slave robots configured to operate according to the manipulating input signal transmitted from the master device, a management control device configured to manage operations of the plurality of slave robots, respectively, and an output device configured to output information transmitted from the management control device. The management control device determines a priority of transmitting the manipulating input signal from the master device to the slave robot among the plurality of slave robots that are in a standby state of the manipulating input signal, and transmits information related to the determined priority to the output device. Thus, the operator is able to efficiently transmit the manipulating input signal to the plurality of slave robots through the master device.