The present invention includes the steps of recognizing an identifier of a song accompaniment through a wireless interface, transmitting an access request for song authentication information of a song accompaniment including the identifier of a song accompaniment, and a song authentication stored in the song accompaniment corresponding to the identifier of the access request. receiving identification information of the information from the management device and determining the song authentication information to be updated based on the identification information; transmitting an update request indicating the song authentication information to be updated to the management device; according to the update request, from the management device It relates to a new song authentication method and a new song authentication system, comprising the steps of indicating song authentication information to be updated and receiving the encrypted song authentication information, and transmitting the encrypted song authentication information at a song accompaniment through a wireless interface.
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