A remote display device includes processing circuitry. The processing circuitry display a display screen. The processing circuitry generate a plurality of display data corresponding to mutually different display areas, each being a part of the display screen. The processing circuitry transmit the plurality of display data generated to a plurality of terminal devices, respectively. The processing circuitry update the display screen based on operation data indicative of an operation performed by the terminal device to the display area corresponding to the display data.