To provide a music data management system that enables recapture of music data into terminals without requiring a user's complicated operations.

A server 110, a PC 120 and a portable audio terminal 130 are communicatively connected via a network 101, and the PC 120 and the portable audio terminal 130 are communicatively connected via a direct line connection. The server 110, PC 120 and portable audio terminal 130 store common user data Du(k), and the user data Du(k) controls download and stream delivery of music data saved in the server 110. When updated in the PC 120 or portable audio terminal 130, the user data Du(k) is sent to the other devices, where it is updated. The user data Du(k) is thereby shared.