1. A method of recognizing a contactless fingerprint, the method comprising: displaying a guide screen for recognizing the contactless fingerprint on a display; receiving an input image of a target object positioned according to the guide screen by using a camera; and establishing a predetermined region on the input image with respect to the target object; calculating a color value difference between the predetermined region and a region of interest (ROI) based on a brightness difference between the predetermined region and the ROI and a weighed value of the brightness difference; analyzing the color value difference in the predetermined region based on the calculated color value difference; and determining whether the received input image is suitable for fingerprint recognition based on the analyzed color value difference.