1. An apparatus for recognizing a face of a person, comprising: a visible light image acquisition unit configured to acquire a visible light image of the person; an infrared image acquisition unit configured to acquire an infrared image of the person; an image analysis module configured to detect respective face areas from the visible light image and the infrared image, estimate a face area of the visible light image by using the infrared image in the case of not detecting the face area of the visible light image, and analyze facial features in the detected or the estimated face area of the visible light image to determine suitability of face recognition; and an illumination control unit configured to control, when the image analysis module determines that the face area of the visible light image is not suitable for face recognition, brightness of illumination so that the visible light image acquisition unit re-acquires a visible light image from which a face is recognizable.