1. A computer-based method for organizing digital photos, comprising: extracting one or a plurality of faces from a plurality of digital photos; displaying an indentified face with an unknown face in the extracted faces on a display screen, the identified face being associated with identification application, and the unknown face not being associated with the identification information and being similar to the identified face; receiving a user input to choose the unknown face so as to associate the unknown face with the identification information of the identified face which is displayed with the unknown face; and associating, after receiving the user input, the chosen unknown face with a group to which the identified face belongs.