Description:   Abstract：Image matching is considered as an important technology in image processing, and it has lots of applications. Simply put, its goal is to find out the spatial relationship between two different images. The conception of earthmover s distance (EMD) is introduced, which can weigh comparability between two images, then a method is constructed to match image based on EMD. Experimental results indicate that image matching using this algorithm has good performance, when it is compared with other algorithms.