A control method of the present disclosure causes a computer of an information apparatus to: display a display screen representing a floor plan for one floor including rooms on the display; display device icons representing target devices within regions of the respective rooms included in the floor plan, the device icons being initially displayed at positions within the regions of the respective rooms; and output to a network a first control command, when selection of an illumination icon, representing an illumination device among the target devices, is sensed within a region of any of the rooms included in the floor plan, and when selection of any region within a room, in which selection of the illumination icon is sensed, is sensed, the first control command controlling on/off of power for an illumination device corresponding to the room in which selection of the illumination icon is sensed.