11. A system for saving digital content classified by person-based clustering, comprising: a data structure generation unit located on one or more processors to generate a data structure including a plurality of nodes using a plurality of digital content; a cluster classification unit located on the one or more processors to classify the remaining digital content by the person-based clustering using a face descriptor if a part of the plurality of digital content is deleted; a data structure update unit located on the one or more processors to update the data structure according to the classification; and a database located on the one or more processors to update and save the remaining digital content by reflecting the updated data structure.
11. A system for saving digital content classified by person-based clustering, comprising: a data structure generation unit located on one or more processors to generate a data structure including a plurality of nodes using a plurality of digital content; a cluster classification unit located on the one or more processors to classify the remaining digital content by the person-based clustering using a face descriptor if a part of the plurality of digital content is deleted; a data structure update unit located on the one or more processors to update the data structure according to the classification; and a database located on the one or more processors to update and save the remaining digital content by reflecting the updated data structure. 12. The system of claim 11 , wherein the data structure update unit updates the data structure of the new digital content and the plurality of the digital content by setting flags of person nodes and face nodes.