1. A method performed by one or more processors configured with computer-executable instructions, the method comprising: receiving an image searching request, the image searching request including an image for search; obtaining description information of the image for search based on the image searching request; generating one or more normalized label vectors based on the description information corresponding to the image for search obtained by the description information, the one or more normalized label vectors corresponding to defined categories selected from a group consisting of a brief entity description label vector, an entity keyword label vector, an entity classification label vector, and an entity attribute label vector; multiplying each of the one or more normalized label vectors by a respective weight; generating a label of the image for search based on the one or more normalized label vectors; and determining one or more images in an image searching database that correspond to the label of the image for search based on a corresponding relationship between one or more respective labels and one or more respective images in the image searching database; wherein the one or more images in the image searching database are preprocessed comprising: generating one or more respective labels corresponding to one or more respective images in the image searching database; and storing the corresponding relationship between the one or more respective labels and the one or more respective images.