A method for controlling an information apparatus, the information apparatus having a display and being connected to a network, a set of target devices being controlled over the network, the method causing a computer of the information apparatus to: display on the display, a display screen representing a floor plan of one floor including at least two rooms; and display device icons, each of the device icons representing one or more of the target devices, on the display screen representing the floor plan; characterized in that the set of the target devices includes specific target devices (201, 209), wherein the specific target devices (201, 209) are the same type of target devices, each of the specific target devices (201, 209) starts to operate according to respective set content, and has a memory in which the set content, when power of each of the specific target devices (201, 209) has been previously turned off, is stored, wherein at least one device icon (11301, 20201), among the device icons, representing one type of the specific target devices (201, 209) is used in common for controlling the one type of specific target devices (201, 209) installed in two or more rooms among the at least two rooms included in the floor plan, each of control target regions (11302, 11303, 21302, 21303)used for controlling one ofthe specific target devices (201, 209) corresponds to one of the two or more rooms in which the one of the specific target devices (201, 209) is installed; sense whether the at least one device icon (11301, 20201) used in common for controlling the one type of the specific target devices (201, 209) is selected; when it is sensed that the at least one device icon (11301, 20201) used in common for controlling the one type of the specific target devices (201, 209) is selected, sense whether a first control target region (11302,21302) among the control target regions (11302, 11303, 21302, 21303) is selected; and output, when it is sensed that the first control target region (11302, 21302) is selected, to the network a first on-off control command, the first on-off control command controlling an on-off state of power of one of the specific target devices (201, 209) installed in one of the two or more rooms corresponding to the first control target region (11302,21302). display on the display, a display screen representing a floor plan of one floor including at least two rooms; and display device icons, each of the device icons representing one or more of the target devices, on the display screen representing the floor plan; characterized in that the set of the target devices includes specific target devices (201, 209), wherein the specific target devices (201, 209) are the same type of target devices, each of the specific target devices (201, 209) starts to operate according to respective set content, and has a memory in which the set content, when power of each of the specific target devices (201, 209) has been previously turned off, is stored, wherein at least one device icon (11301, 20201), among the device icons, representing one type of the specific target devices (201, 209) is used in common for controlling the one type of specific target devices (201, 209) installed in two or more rooms among the at least two rooms included in the floor plan, each of control target regions (11302, 11303, 21302, 21303)used for controlling one ofthe specific target devices (201, 209) corresponds to one of the two or more rooms in which the one of the specific target devices (201, 209) is installed; sense whether the at least one device icon (11301, 20201) used in common for controlling the one type of the specific target devices (201, 209) is selected; when it is sensed that the at least one device icon (11301, 20201) used in common for controlling the one type of the specific target devices (201, 209) is selected, sense whether a first control target region (11302,21302) among the control target regions (11302, 11303, 21302, 21303) is selected; and output, when it is sensed that the first control target region (11302, 21302) is selected, to the network a first on-off control command, the first on-off control command controlling an on-off state of power of one of the specific target devices (201, 209) installed in one of the two or more rooms corresponding to the first control target region (11302,21302).