Viewing history recording method and viewing history usage

摘要

In electric appliances ( 11 ) such as a digital TV and the like, a device agent ( 20 ) records viewing-and-listening date and time, a media type identifier and a content identifier in a group as viewing-and-listening history data. In server system ( 12 ), a user agent ( 30 ) receives viewing-and-listening history data from the device agent ( 20 ) and registers the viewing-and-listening history data in a viewing-and-listening history database. Each of external service concierges ( 40 ) and ( 50 ) accesses the server system ( 12 ) and collectively utilizes content viewing-and-listening histories in the electric appliances ( 11 ) that a user owns.