Image classification method and system

The application provides an image classification method and system. The classification method comprises: layering is carried out on a to-be-classified image according to a feature of the to-be-classified image and an image layer meeting a preset condition is obtained; a track corresponding to the image layer is obtained by using a transformation group in a classifier constructed in advance; and the center of the track is compared with a plurality of approximation track centers in an approximation track center set of the classifier to determine the type of the to-be-classified image. According to the method, layering is carried out, the track is searched by using the classifier constructed in advance, the center of the obtained track is compared with the approximation track centers in the classifier to determine the type of the to-be-classified image. With the method the speed requirement can be met; and the image classification speed can be accelerated.