1. A method of seeking one or more representative images in an image set including plural images, comprising: a text feature extracting step of extracting one or more text features of each of the plural images in the image set based on original data of the corresponding images and/or annotation information input by a user; a diversity data obtaining step of obtaining diversity data of the image set based on the text features of each of the plural images in the image set, wherein, the diversity data is used to express discrepancies between contents of any two images in the image set; a representative score calculating step of calculating a representative score of each of the plural images based on the diversity data of the image set, wherein, the representative score is used to express a representativeness of a content of each of the plural images with regard to contents of all the images in the image set; and a representative image selecting step of selecting one or more of the images in the image set based on the representative score of each of the plural images in the image set, wherein, the one or more images represent the contents of all the images in the image set, and serve as the one or more representative images.