To provide a music piece information attachment server, a terminal and a music piece information attachment system, capable of finding out a music piece which a user does not know, by considering user's taste.

The music piece information attachment server 1 is provided with: a storage section 11 for storing a music information data base 26 which relates a plurality of music pieces with a feature data for indicating a feature regarding the plurality of music pieces; a receiving control section 20 for receiving a data regarding an original music piece which is an object music piece transmitted from a connected terminal 3 via network 2; a comparison means 22 for comparing the feature data of the original music piece with the feature data of the plurality of music pieces in the music piece information data base 26; and a post attachment data generation means 23 for generating a post attachment data to which a weighted data is attached corresponding to the feature data for each of the plurality of music pieces according to the comparison result.

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