A control method is provided for an information apparatus having a display and being connected to a network, one or more target devices being controlled over the network. The method causes a computer of the information apparatus to display a first display screen on the display when the first display screen is selected, the first display screen displaying one or more control icons that allow operation or state confirmation of the one or more target devices. The method also causes the computer to display a second display screen representing a floor plan of a building on the display when the second display screen is selected, and to display each of one or more device icons representing the one or more target devices on the second display screen representing the floor plan, where the floor plan includes one or more rooms.