A settop box based on an IPTV according to an embodiment of the present invention includes: a home network interface communicating with one or more mobile terminals; a terminal profile manager acquiring and managing a terminal profile from a mobile terminal connected through the home network interface; a contents converter converting contents received from an external contents server through an external network to mobile contents suitable for the corresponding mobile terminal on the basis of the acquired terminal profile; a contents storage storing the contents converted by the contents converter; and a transmitting/receiving controller performing a processing operation to extract the mobile contents stored in the contents storage and transmit the extracted mobile contents to the mobile terminal through the home network interface in accordance with a request from a user.