The present invention provides a method for establishing a connection path by way of a wireless LAN path of a projector and a wireless LAN terminal even when the operating mode is switched. The method establishes a wireless LAN connection between a wireless LAN terminal and a projector that can operate as an access point apparatus or a client apparatus of a wireless LAN. The projector projects connection information that indicates SSID, the wireless LAN terminal receives the connection information as input by way of a provided input unit, and further, operates as an access point apparatus. The projector detects the wireless LAN terminal that is operating as an access point device by means of a site survey, and the projector then connects to the wireless LAN terminal as a client apparatus.