1. A method for matching two map images performed by an image processing device, with a first map image data and a second map image data, having at least some overlap area, the method comprising the image processing device implemented steps of: extracting color features of the first map image data and the second map image data, deciding color matching areas of the first map image data and the second map image data based on the color features, the color matching area having the same color in the first map image data and the second map image data, extracting border features of the color matching areas of the first map image data and the second map image data, wherein the border features include geometric features of the borders, deciding common areas of the first map image data and the second map image data based on the color matching area and the border features, the common areas having same border features in the color matching areas of the first map image data and the second map image data, extracting feature points of the common areas of the first map image data and the second map image data, and combining the first map image data and the second map image data according to the feature points.