An IP broadcast terminal 30 is connected with a multicast address management device 10 for IP broadcast that holds multicast information via an IP multicast network 40 over which IP broadcast service is provided, and when a user issues a request to change an IP broadcast channel, generates a query message including an IP broadcast channel identifier requested from the IP broadcast terminal 30 to transmits it to the multicast address management device 10 for IP broadcast. The IP broadcast terminal 30 receives a response message showing the correspondence between IP broadcast channel identifiers and multicast addresses from the multicast address management device 10 for IP broadcast, and transmits a video reception request message to a multicast group decided for reception.