A fast and exact approach is presented to extract the corners of eyes on human faces automatically. It can locate the positions of eyes with its near and far corners exactly with over 98% accuracy. And it provises the basis of extracting the vital feature points on human face automatically and improves the accuracy of face recognition. Then, applying the results to the pretreatment of the face images, a method using the distance of two far corners of eyes to normalize the face images is presented. It could get more exacter and steadier outcomes than the method commonly using the distance of two irises.