A contents receiving system can include a content receiver and a portable terminal storing ID information. The content receiver can further include: a receiving unit capable of receiving content and subsidiary content from at least one of a broadcast wave and a network; an output unit capable of outputting, as audio video content, a video and/or audio of the content received by the receiving unit; a transmission unit capable of transmitting the subsidiary content to the portable terminal, the transmission unit enabling information on a payment transaction corresponding to an ID information of the portable terminal to be transmitted to the portable terminal individually, the portable terminal including: a second transmission unit capable of receiving the subsidiary content and the information on the payment transaction transmitted from the transmission unit of the content receiver; and a processing unit for performing a processing regarding the payment transaction.