An apparatus for controlling a mobile device according to the present invention includes: a conversation recognition unit configured to recognize a conversation between users through mobile devices; a user intent verification unit configured to verify an intent of at least one user among the users based on the recognition result; and an additional function control unit configured to execute an additional function corresponding to the verified user's intent in a mobile device of the user. According to the present invention, great contribution may be made to improve communication between users by recognizing the conversation between the users, thereby directly providing information associated with the conversation or providing a service.