PROBLEM TO BE SOLVED: To enable a user to use a convenient service by enabling automatic access to a friendship relation, a group relation and a chat room for transmission and sharing.SOLUTION: A messenger linked service system performed by executing a messenger and user authentication of a messenger linked application includes a relation extraction part for extracting a social graph between a messenger user and friends, a selection part for selecting data to be transmitted to a friend or data to be shared with the friend by the messenger linked application, and an execution part for executing transmission or sharing requirement of the selected data to the friend on the basis of the social graph.
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