A terminal device for carrying out an interactive internet protocol television (IPTV) service comprises: a near distance communication unit to receive set-top box information from a remote controller which controls a set-top box used for the interactive IPTV service; a session setup unit to set up a session to communicate between the terminal device and the set-top box based on the set-top box information; a content information receiver to receive, from the set-top box, content information on content being played by the set-top box over the set up session; a content information transmitter is configured to transmit the content information received from the content information receiver to an information provider; and content-related information receiver to receive content-related information from the information provider, the content-related information is extracted by the information provider from prestored information on a plurality of contents based on the content information.