A receiving section receives an installation request including a validation date and time when a license of a plug-in is validated from a management apparatus. A license key acquiring section acquires a license key of the plug-in by requesting temporary issue thereof from a license server prior to the activation date and time. A plug-in acquiring section acquires the plug-in by requesting distribution thereof from a plug-in server prior to the validation date and time. A license key acquisition determining section determines whether the license key of the plug-in can be acquired from the license server at the time when the validation date and time has passed. An installing unit causes a multifunction peripheral to install therein the plug-in by using the temporarily issued license key and the plug-in when it is determined that the license key cannot be acquired.