Information processing device and information processing method

The present invention concerns an information processing device which checks whether the content related information retrieved by the content reproducing device is associated with the content pieces recorded in the content reproducing device and which changes the functional operation and selection operation on the screen according to the check result. More specifically, the information processing device comprises: a content related information retrieve unit to retrieve the content related information such as content evaluation results into the content reproducing device; a content management unit to manage content management information such as information about content pieces recorded or received by the content reproducing device and about licenses for the content pieces; and a content control unit to determine a method of processing the content related information retrieved by the content related information retrieve unit according to the content management information held by the content management unit.