To enable respective doctors to make rounds without mistaking wards on the basis of the display of corridor lamps, even when the plurality of doctors make rounds in the same time zone, while protecting privacy of patients.

A nurse call master unit includes an operation reception part 22 for receiving the operation of setting a round mode, and a display control part 23 for transmitting doctor information indicating a doctor in charge of a patient in a ward where a corridor lamp is installed to the corridor lamp and making it be displayed when the operation reception part 22 receives the operation, and by not immediately displaying patient information at the corridor lamp according to the setting of the round mode, the privacy of the patient is allowed to be protected. Further, even when the plurality of doctors make rounds in the same time zone, by having the respective doctors making rounds check whether or not their information is displayed at the corridor lamp, the ward to make rounds can be easily recognized without mistakes.