A radiation imaging system comprises: a radiation imaging apparatus； an entry apparatus which is associated with a radiation generator； wherein the entry apparatus is configured, in response to a request received from the radiation imaging apparatus via a close proximity wireless communication connection, to send information to the radiation imaging apparatus via the close proximity wireless communication connection for connecting the radiation imaging apparatus to a wireless LAN； wherein the close proximity wireless communication connection has a communication range shorter than that of a wireless LAN； and a control unit for controlling the radiation generator and the radiation imaging apparatus, which has connected to the wireless LAN based on the information which has been sent from the entry apparatus via the close proximity wireless communication connection.
