1. A method for providing information on an object included in a visual field of a terminal in a form of augmented reality (AR) by using an image inputted to the terminal and its relating information, comprising the steps of: (a) specifying the visual field of the terminal corresponding to the inputted image by referring to at least one piece of information on a location, a displacement and a viewing angle of the terminal; and (b) acquiring a graphic element corresponding to the object, included in the visual field of the terminal, whose identity is recognized by using a technology for matching a building image and displaying the acquired graphic element with the inputted image in the form of the augmented reality by providing the graphic element on a location of the object displayed on a screen of the terminal.