With the increase in the proportion of keeping pets, most of pets have still been abandoned and missing. This problem is the main factor causing the surplus of stray dogs. To solve the problem about stray dogs, we not only need the legislation, but also should effectively manage the quantity of dogs. In our research, we use dog nose prints, which is unique as human fingerprints. Besides, using techniques of image processing to develop our Dog Nose Print Image Matching system, which can solve the problem of managing dogs. The dog nose print image matching system is mainly divided into two parts: dog nose print image segmentation and dog nose print image matching. We continue "Pivot Point Location of Dog Nose Printimage" (Lin, 2017) to cut out the entire dog nose pattern. Then, locating the best pivot point of the image, and matching the patterns even though the nose of those images are different angles and directions. By this method, we achieve our purpose of identifying dogs.