An image-based query information query method for a product description, comprising either: - establishing a correspondence relationship between at least a certain part in the product description and first visual data for displaying a certain state or part of a described product, and storing the at least a certain part in the product description, the first visual data and the correspondence relationship therebetween; and extracting first feature information from the first visual data; or - establishing a correspondence relationship between at least certain part in the product description and first feature information of first visual data for displaying certain state or part of a described product, and storing the at least certain part, the first feature information and the correspondence relationship therebetween; said method further comprising: acquiring second visual data for displaying a certain state or part of the product, extracting second feature information from the second visual data, or directly acquiring second feature information from the second visual data for displaying the certain state or part of the product, the second feature information being extracted from a barcode or directly acquired from a text label, wherein the barcode or text label are adhered to the specific part of the product; comparing the second feature information with the first feature information to determine whether the first visual data and the second visual data display the same state or part of the product, thereby querying a corresponding part in the product description, and returning a query result; wherein the visual data are pictures or videos and the visual data and the feature information have a one-to-one correspondence relationship, wherein the product description is at least one of a text, picture, audio format or video format. - establishing a correspondence relationship between at least a certain part in the product description and first visual data for displaying a certain state or part of a described product, and storing the at least a certain part in the product description, the first visual data and the correspondence relationship therebetween; and extracting first feature information from the first visual data; or - establishing a correspondence relationship between at least certain part in the product description and first feature information of first visual data for displaying certain state or part of a described product, and storing the at least certain part, the first feature information and the correspondence relationship therebetween; said method further comprising: acquiring second visual data for displaying a certain state or part of the product, extracting second feature information from the second visual data, or directly acquiring second feature information from the second visual data for displaying the certain state or part of the product, the second feature information being extracted from a barcode or directly acquired from a text label, wherein the barcode or text label are adhered to the specific part of the product; comparing the second feature information with the first feature information to determine whether the first visual data and the second visual data display the same state or part of the product, thereby querying a corresponding part in the product description, and returning a query result; wherein the visual data are pictures or videos and the visual data and the feature information have a one-to-one correspondence relationship, wherein the product description is at least one of a text, picture, audio format or video format. acquiring second visual data for displaying a certain state or part of the product, extracting second feature information from the second visual data, or directly acquiring second feature information from the second visual data for displaying the certain state or part of the product, the second feature information being extracted from a barcode or directly acquired from a text label, wherein the barcode or text label are adhered to the specific part of the product; comparing the second feature information with the first feature information to determine whether the first visual data and the second visual data display the same state or part of the product, thereby querying a corresponding part in the product description, and returning a query result; wherein the visual data are pictures or videos and the visual data and the feature information have a one-to-one correspondence relationship, wherein the product description is at least one of a text, picture, audio format or video format.