Provided are an apparatus and method for matching a 2D color image and a depth image to obtain 3D information. The method includes matching resolution of the 2D color image and resolution of a light intensity image, wherein the 2D color image and the light intensity image are separately obtained, detecting at least one edge from the matched 2D color image and the matched light intensity image, and matching overlapping pixels of the matched 2D color image and a depth image, which corresponds to the matched light intensity image, with each other in case that the matched 2D color image and the depth image are overlapped as much as the matched 2D color image and the matched light intensity image are overlapped so that the detected edges of the matched 2D color image and the detected edges of the matched light intensity image are maximally overlapped with each other. Accordingly, the 2D color image and the depth image can be accurately matched so that reliable 3D image information can be quickly obtained.