Abstract: The distance between an information processing terminal and each image forming apparatus is detected based on the position information of the information processing terminal and each image forming apparatus, and the difference in elevation and layout drawing are checked to determine whether or not the image forming apparatus is located in the same floor or room with the information processing terminal, whereby the image forming apparatus is selected, and a request to shift the power state to the power-on side is sent to the selected image forming apparatus. Further, the server device provides such power control as to acquire the information on the position and number of terminal devices in the started-up state and the information of the position of each image forming apparatus, and to select the image forming apparatus to be set to the power-on state out of plural image forming apparatuses, based on this information.