1. A method for parsing an image, comprising: processing, by a device, an image on the device; obtaining, by the device, key characteristics of the image; parsing, by the device, the image with a two-dimension decoding mode; and obtaining, by the device, content information of the image; wherein processing, by the device, the image on the device and obtaining, by the device, the key characteristics of the image comprises: converting, by the device, the image on the device into a Grayscale image; detecting, by the device, the Grayscale image; identifying, by the device, positioning images of the Grayscale image; and taking, by the device, the positioning images of the Grayscale as the key characteristics of the image.