1. A high-quality content generation system comprising: a feature extractor configured to extract features of contents from a plurality of the contents; a content grouping unit configured to collate the features of a plurality of the contents extracted by said feature extractor, to group identical contents with derived contents produced by using the identical contents to be included in said plurality of the contents, and to calculate identical/derived content grouping information; and a high-quality content generator configured to select the contents to be grouped with said identical/derived content grouping information from among said plurality of the contents, and to generate contents for which a quality is improved by employing the selected contents, wherein the contents comprise at least one from among digitalized multimedia content, picture content, and video content.