A panelboard device according to an embodiment includes a housing and multiple devices stored in the housing. At least one of the multiple devices includes a device main unit; a state detecting unit configured to detect a state of the device main unit; a light emitting unit; and a light emission control unit configured to acquire information indicating the state of the device main unit from the state detecting unit, and to cause the light emitting unit to transmit an optical signal including information indicating the state.