A method for generating a representation of a search object comprises: obtaining a textual description of a search object and an image of the search object; dividing the image of the search object into a plurality of image patches, performing feature extraction on the plurality of image patches respectively through an image feature extraction model, and obtaining a feature sequence of the plurality of image patches; extracting a pixel-level feature from the image of the search object through a text feature extraction model, and determining a representation vector of the search object based on the feature sequence, the pixel-level feature, and the image of the search object. Since the extracted feature sequence and pixel-level feature represent high-level and low-level features of the image, the determined features of the image of the search object are comprehensive and accurate, and the constructed representation vector of the search object is accurate.