The invention provides a peripheral control device for allowing the user to select preferentially a setting of a peripheral device through a wired port. A setup utility searches a port of a printer installed onto a computer to search a pertinent printer. If the pertinent printer is found during the above searching, the peripheral control device acquires MAC address information through that port. When as a result of the searching, the pertinent printer having the same MAC address is found through a different port, the peripheral control device presents a wired port of the above-mentioned pertinent printer as a candidate in a settable port list. When changing a setting of a wireless LAN printer, the utility communicates with the printer through each printer port installed at the time of activating the setup utility, not via wireless LAN.