1. An image processing system comprising: a portable terminal including a shooting unit and a display unit; a plurality of image processing apparatuses each including a sensor for detecting a state of the image processing apparatus; and a server capable of mutually communicating with said portable terminal, wherein said server (i) includes a first acquisition unit for acquiring a detected value in said sensor as information of each of said plurality of image processing apparatuses, (ii) includes a second acquisition unit for acquiring a position and an orientation of said portable terminal during shooting with said shooting unit, and (iii) acquires positional information of the image processing apparatus as said information of each image processing apparatus using said first acquisition unit, said server or said portable terminal includes a first processing unit for executing a process of deciding a priority of said plurality of image processing apparatuses by referring to said information of each image processing apparatus, wherein said first processing unit decides a priority of image processing apparatuses present in a shooting range of said portable terminal, among said plurality of image processing apparatuses, by referring to said information of each image processing apparatus, and said portable terminal includes a second processing unit for executing a process of combining a shot image of an image processing apparatus obtained by shooting with said shooting unit, with an image representing said decided priority for that image processing apparatus, and displaying the combined image on said display unit.