105 and 205 and the upnp media renderers 103 and 203 the upnp internet gateway controller 160 controls a upnp internet gateway based on the upnp message processor 140 to open and close an external port for multimedia streaming the extensible home connector setup processor 170 sets up configuration information of an extensible home connector based on a upnp protocol a message transforming processor 180 includes a upnp message into a jxta message on a local upnp network and transmits the jxta message in order to relay the upnp message between hetero upnp networks fig3 is a flowchart illustrating a method for providing a multimedia service between hetero upnp networks according to an embodiment of the present invention the present invention relates to a method for controlling physically separated upnp a v devices and providing a streaming service therebetween using two separated channels which are a control channel for finding and controlling a upnp device and transmitting an event message and a data channel for streaming multimedia data between home networks isolated from the outside by a network address converter or a fire wall in the method according to the present embodiment an extensible home connector establishes a communication channel to a relay peer to receive a message relaying and propagating service in operation s 10 in operation s 20 channel information of the extensible home.