The prevent invention relates to a portable mobile apparatus for a user for providing a supplementary service and a method for providing a supplementary service by using the same, and more particularly, to an apparatus and a method for providing supplementary enhanced services by using an application run in a portable mobile terminal when the portable mobile terminal such as a cellular phone or a smart phone is used for a service through short-range RF communication. The present invention can provide a variety of supplementary services to the user by using an operation function included in the application in the mobile terminal when performing the services through the short-range RF communication. Specifically, it is possible to automate the supplementary function or provide convenience to the user and interact with the user.