To provide an audience information collecting system for collecting audience information of contents, which are listened and viewed at a portable terminal, correctly.

Terminal identification information for identifying a portable terminal 100 uniquely and information about the TV program listened and viewed at the portable terminal 100 are transmitted from the portable terminal 100. Based on the terminal identification information, subscriber information of the portable terminal 100 is retrieved. Then, audience condition information is generated from the information about the TV broadcast, which was transmitted from the portable terminal 100, and the retrieved prescriber information.