User authentication system for shopping cart and method thereof

Shopping cart user authentication system and control method using a user authentication card to perform authentication for the use of the cart is disclosed. The invention CART use stage, CART connection that recognizes a user authentication card request to connect to the authentication server, user authentication, authorization of the user authentication card, and when the check whether a successful authentication from the authentication server release the cart connection link When you connect the ring to the other shopping cart link includes a cart return step of returning the card user authentication request to an authentication server for user authentication off.