The present disclosure provides a wear system for providing a service. The wear system may comprise a wear device configured to detect authentication information regarding a user wearing the wear device in a first state, to transmit the authentication information to a server, and if authentication of the user is complete through the server, to detect user data of the wear device in a second state and to transmit the user data to the server and the server, upon detecting identification information regarding the user using the authentication information received from the wear device, to complete the authentication of the user, to generate a user profile based on the user data received from the wear device, to store the user profile corresponding to the identification information, and to provide service information related to the user to the wear device.