A workstation includes a receiver configured to receive identification information of an X-ray detector from the X-ray detector； a controller configured to set assign indicator information of the X-ray detector, based on the received identification information of the X-ray detector； an output unit configured to display the set assign indicator information of the X-ray detector； and a transmitter configured to transmit the set assign indicator information of the X-ray detector to the X-ray detector. The X-ray detector includes a transmitter configured to transmit the identification information of the X-ray detector to the workstation； a receiver configured to receive the assign indicator information from the workstation after the transmitter transmits the identification information of the X-ray detector to the workstation； and an output unit configured to display an assign indicator based on the received assign indicator information.
