There is provided an AV server device in a home network for enabling transmission/reception of an AV content between digital AV apparatuses connected with communication interfaces of different standards while protecting copyright. The AV server device includes an HDD (11) for recording a content and its attribute information; a format conversion portion (12) for converting the format of the content; and a plurality of communication interfaces (13, 14) for transmitting/receiving a content to/from an external apparatus through the HDD (11). When receiving a reproduction and output request of a content from the external apparatus, a CPU (16) judges whether the content can be reproduced or not based on the standard information and copyright protection information of the communication interface of a recording source included in the attribute information of the content, existence of authentication of copyright protection, and the standard information of the communication interface of reproduction output destination, and then delivers a content which can be reproduced and output after performing data conversion thereof to a format which can be received by the external apparatus of a request source.