In an image forming system, a map image generation portion obtains positional information of image forming apparatuses having been detected, from the image forming apparatuses having been detected, and generates a map image that indicates, by disposing device icons representing the image forming apparatuses having been detected, a distance and a direction of each image forming apparatus having been detected, relative to a present position and a present orientation of a mobile terminal apparatus, based on the present position and the present orientation of the mobile terminal apparatus and the positional information of the image forming apparatuses having been detected. An output instruction portion transmits an output instruction, to the image forming apparatus corresponding to a device icon selected from among the device icons in the map image displayed on a display device.