1. An iris scanning apparatus for identifying a subject, the apparatus comprising: a light source for radiating infrared light toward an eye of a subject; a narrow angle image collector for collecting an image of the eye radiated by the light source; a wide angle image collector for collecting an image of an overall face including the eye; an image display for displaying the image collected by the narrow angle image collector and the image collected by the wide angle image collector; and an image processor for determining whether an eye exists in the collected images, and performing, when an eye is determined to exist, iris scanning with the collected image of the eye.