An information processing method comprising steps of: obtaining a first importance degree of a target person who appears in a first image group that collects images captured in a first event, using an appearance count of the target person in the first image group; and selecting a candidate image from the first image group, characterized by further comprising: obtaining a second importance degree of the target person using an appearance count of the target person in a second image group, containing a plurality of image groups that collect images captured in a plurality of events, which comprise the first image group and a plurality of image groups different from the first image group, and determining whether the target person is an important person based on at least one of the first importance degree and the second importance degree, wherein, in the determining step, the target person is determined as the important person, in a first case in which the first importance degree of the target person exceeds a first threshold (S702:YES) and in a second case in which the second importance degree of the target person exceeds a second threshold (S703:YES) even if the first importance degree of the target person does not exceed the first threshold (S702: NO), and if the target person is determined as the important person in the determining step, the candidate image is selected in the selecting step as an image of the target person from the first image group. obtaining a first importance degree of a target person who appears in a first image group that collects images captured in a first event, using an appearance count of the target person in the first image group; and selecting a candidate image from the first image group, characterized by further comprising: obtaining a second importance degree of the target person using an appearance count of the target person in a second image group, containing a plurality of image groups that collect images captured in a plurality of events, which comprise the first image group and a plurality of image groups different from the first image group, and determining whether the target person is an important person based on at least one of the first importance degree and the second importance degree, wherein, in the determining step, the target person is determined as the important person, in a first case in which the first importance degree of the target person exceeds a first threshold (S702:YES) and in a second case in which the second importance degree of the target person exceeds a second threshold (S703:YES) even if the first importance degree of the target person does not exceed the first threshold (S702: NO), and if the target person is determined as the important person in the determining step, the candidate image is selected in the selecting step as an image of the target person from the first image group. obtaining a second importance degree of the target person using an appearance count of the target person in a second image group, containing a plurality of image groups that collect images captured in a plurality of events, which comprise the first image group and a plurality of image groups different from the first image group, and determining whether the target person is an important person based on at least one of the first importance degree and the second importance degree, wherein, in the determining step, the target person is determined as the important person, in a first case in which the first importance degree of the target person exceeds a first threshold (S702:YES) and in a second case in which the second importance degree of the target person exceeds a second threshold (S703:YES) even if the first importance degree of the target person does not exceed the first threshold (S702: NO), and if the target person is determined as the important person in the determining step, the candidate image is selected in the selecting step as an image of the target person from the first image group.