1. A method for image resolution enhancement, including the following steps: providing an original image; utilizing a fuzzy analysis system to analyze the original image and classifying the original image into the one with edge quality and the other one without edge quality; calculating the edge angle of the area classified to be with edge quality and processing the area with neural network interpolation; processing the area classified to be without edge quality with bilinear interpolation; and obtaining a high-resolution digital image after completing the whole original image processing.