A method for controlling an information apparatus, the information apparatus having a touch panel display and being connected to a network, an electric curtain device being controlled over the network, the electric curtain device being capable of opening and closing a curtain through remote operation, the method causing a computer of the information apparatus to: display an operation icon on the touch panel display of the information apparatus, the operation icon causing an operation screen for the electric curtain device to be displayed; display the operation screen for the electric curtain device on the touch panel display when selection of the operation icon is sensed, the operation screen including a curtain image representing the curtain of the electric curtain device; and when a pinch-out operation is sensed on the operation screen, output to the network a first open control command for opening the curtain of the electric curtain device in accordance with an operation width of the pinch-out operation, wherein the pinch-out operation is defined as an operation in which a distance between contact positions of two contacting object on the operation screen increases, characterized in that when the pinch-out operation is sensed on the operation screen and when the first open control command is outputted to the network subsequently to sensing the pinch-out operation, display of the curtain image on the operation screen is varied from a state in which the curtain of the electric curtain device is closed to a state in which the curtain of the electric curtain device is opened, the curtain image on the operation screen being opened for a width matching an operation width of the pinch-out operation, and the operation screen stays to be displayed for a further pinch-out operation to be performed on the operation screen, after the first open control command is output to the network. display an operation icon on the touch panel display of the information apparatus, the operation icon causing an operation screen for the electric curtain device to be displayed; display the operation screen for the electric curtain device on the touch panel display when selection of the operation icon is sensed, the operation screen including a curtain image representing the curtain of the electric curtain device; and when a pinch-out operation is sensed on the operation screen, output to the network a first open control command for opening the curtain of the electric curtain device in accordance with an operation width of the pinch-out operation, wherein the pinch-out operation is defined as an operation in which a distance between contact positions of two contacting object on the operation screen increases, characterized in that when the pinch-out operation is sensed on the operation screen and when the first open control command is outputted to the network subsequently to sensing the pinch-out operation, display of the curtain image on the operation screen is varied from a state in which the curtain of the electric curtain device is closed to a state in which the curtain of the electric curtain device is opened, the curtain image on the operation screen being opened for a width matching an operation width of the pinch-out operation, and the operation screen stays to be displayed for a further pinch-out operation to be performed on the operation screen, after the first open control command is output to the network.