1. An apparatus for detecting a pedestrian by a vehicle during night driving, comprising: a first camera configured to take a first image including color information of a vicinity of the vehicle during night driving; a second camera configured to take a second image including thermal distribution information of the vicinity of the vehicle; a pedestrian detector configured to detect a non-pedestrian area by using the color information from the first image and detect a pedestrian area by excluding the non-pedestrian area from the second image; and a display configured to match and display the pedestrian area on the second image, wherein the pedestrian detector comprises: an image matcher configured to match the first image and the second image by matching corresponding coordinates of the first image and the second image; a non-pedestrian area detector configured to detect an area in which a color value is more than a reference value as the non-pedestrian area from the first image based on the color information of the first image; and an attention area extractor configured to extract an attention area by excluding the non-pedestrian area from the second image.