The invention relates to a method for detecting the change of earth's surface, based on remote sensing image processing, which comprises following steps: 1, cutting the standard image and the detected image, to attain cut result image, while each cut section of result image has a section gray characteristic value and section area characteristic value; 2, point-to-point processing following judgments according to said section gray scale and section area change amplitude: if the section gray scale changes, but the section area not, said change is a false change; or else if the section area changes, but the section gray scale not, it is a false change; if the gray scale and the area both change, using the moment with small change as the measure valve of earth' surface change. With said invention, user can attain accurate detect result on the change of earth' surface by the remote sensing image.