Method of contents sharing based on non-realtime iptv service

PURPOSE: A content sharing method based on non-real time IPTV is provided to safely transmit IPTV content to members after receiving non-real time IPTV content. CONSTITUTION: An IPTV redistribution offering device encodes content through a public value(S223). The IPTV redistribution offering device transmits the encoded content to an IPTV redistribution target device through the public value(S225). The IPTV redistribution offering device generates a content supplying event message through the public value(S227). The IPTV redistribution offering device transmits the generated content offering event message to the IPTV redistribution target device(S229).