1. An information processing device for use with a user, the information processing device comprising: a memory storing: (i) a plurality of target information, and (ii) a plurality of biological information; and a processor operatively coupled to the memory, the processor being programmed to: acquire: (i) the plurality of target information from an image shot by the user to be stored in the memory, the acquired target information representing at least one shooting target shown in the image shot by the user, and (ii) the biological information measured individually for each image from the user when the image is shot, the plurality of target information and the biological information are associated with each other, for each of a plurality of images shot by the user, count a number of times the shooting target is shown in the image, extract a plurality of biological information associated with target information representing a designated shooting target, and specify an emotion of the user, which corresponds to the designated shooting target, based on the counted number of times the shooting target is shown in the image and the extracted biological information.