Abstract: A method for providing a social network service (SNS) to share predetermined data between users who are acquaintances of each other includes transmitting music-matched photo data from one or more user terminals and registering the photo data in the service providing server. The music-matched photo data includes one or more of photo data matched to predetermined music transmitted from a user terminal of a user, photo data matched to predetermined music transmitted from user terminals of users who are acquaintances of the user, and photo data recommended a predetermined number of times or more or ranked in a predetermined place or higher in terms of recommendation among photo data registered as being matched to the predetermined music.