The invention relates to an image-text content comparison method and device. The method comprises the steps of obtaining an original file and a comparison file to be compared; respectively splitting the original file and the comparison file into a plurality of pictures according to page numbers; carrying out difference detection on the plurality of split pictures of the original file and the comparison file according to corresponding page numbers to obtain a difference image; and marking the modified content in the comparison file by adopting an edge detection algorithm. According to the technical scheme provided by the invention, the difference between the original file and the comparison file is determined by utilizing the difference detection and the edge detection of the image and is marked, so that the comparison speed and the comparison accuracy are improved.