A projector connected to a terminal device via a network includes: a confirming unit to confirm whether an IP address has been changed; a creating unit to create an executable file for executing image transfer software using a changed IP address, if the IP address is confirmed to have been changed; a delivering unit to deliver the executable file in response to a request from the terminal device; a receiving unit to receive, from the terminal device in which the image transfer software has been run by the executable file, a connection based on the changed IP address and receive a transfer of image information on an image being displayed in the terminal device; and a projecting unit to project the image being displayed in the terminal device using the image information.