A method of operation of a mobile terminal set as augmented reality mode, the method comprising: displaying, on a display module, a preview image generated by a camera module, the preview image comprising a plurality of object information items; obtaining location information of the mobile terminal; characterized in that the method further comprises the steps of: obtaining object information for at least one object shown in the preview image from an object information database in the mobile terminal based on the location information and shape recognition of the preview image; displaying the object information using a display form having a default size when no user preference level for the object information is stored in a memory of the mobile terminal; displaying the object information using a display form having a size larger than the default size when a high user preference level for the object information is stored in the memory; displaying the object information using a display form having a size smaller than the default size when a low user preference level for the object information is stored in the memory; removing display of the plurality of object information items from the preview image and reducing a user preference level corresponding to each of the removed plurality of object information items in response to a touch input comprising a drag in a downward direction; and redisplaying the plurality of object information items on the preview image in response to a touch input comprising a drag in an upward direction, the redisplayed plurality of object information items having a size smaller than the removed plurality of object information items. displaying, on a display module, a preview image generated by a camera module, the preview image comprising a plurality of object information items; obtaining location information of the mobile terminal; characterized in that the method further comprises the steps of: obtaining object information for at least one object shown in the preview image from an object information database in the mobile terminal based on the location information and shape recognition of the preview image; displaying the object information using a display form having a default size when no user preference level for the object information is stored in a memory of the mobile terminal; displaying the object information using a display form having a size larger than the default size when a high user preference level for the object information is stored in the memory; displaying the object information using a display form having a size smaller than the default size when a low user preference level for the object information is stored in the memory; removing display of the plurality of object information items from the preview image and reducing a user preference level corresponding to each of the removed plurality of object information items in response to a touch input comprising a drag in a downward direction; and redisplaying the plurality of object information items on the preview image in response to a touch input comprising a drag in an upward direction, the redisplayed plurality of object information items having a size smaller than the removed plurality of object information items. obtaining object information for at least one object shown in the preview image from an object information database in the mobile terminal based on the location information and shape recognition of the preview image; displaying the object information using a display form having a default size when no user preference level for the object information is stored in a memory of the mobile terminal; displaying the object information using a display form having a size larger than the default size when a high user preference level for the object information is stored in the memory; displaying the object information using a display form having a size smaller than the default size when a low user preference level for the object information is stored in the memory; removing display of the plurality of object information items from the preview image and reducing a user preference level corresponding to each of the removed plurality of object information items in response to a touch input comprising a drag in a downward direction; and redisplaying the plurality of object information items on the preview image in response to a touch input comprising a drag in an upward direction, the redisplayed plurality of object information items having a size smaller than the removed plurality of object information items.