A PC includes: an image data setting section for (i) setting, to background image data indicative of a background image, apparatus image data obtained by capturing an image of an apparatus and serving as referential image data to be referred to for identifying the apparatus, and (ii) setting, to the apparatus image data, dynamic part image data indicative of a dynamic part image positioned on the apparatus image; and an address setting section for (i) associating, with the dynamic part image data, (a) an address for specifying a storage area of a memory in which storage area data to be accessed by a portable terminal device is stored and (b) address substitutive information to be substituted for the address, and (ii) generating address display data to be used to display the address substitutive information instead of the address.