A method of the present disclosure causes a computer of an information apparatus to: display device type icons on a display; display room icons on the display; when it is determined that selection of any one of the device type icons is detected, display room icons each representing a room, in which a target device of a type corresponding to the selected device type icon is installed, in a different display mode from a mode for room icons each representing a room in which the target device of the type is not installed; when it is determined that selection of a room icon displayed in the different display mode is detected, display a first operation screen for operating a controlled target device on the display; and output a control command for controlling the controlled target device to the network based on an operation on the first operation screen.