A page re-ranking system includes a super page producing part that produces a super page where page contents are combined between multiple versions for each of multiple Web pages that can be obtained as a search result page in compliance with a user's query and to which a page ranking is created, a super page analyzing part that analyzes a covering degree of a topic representation that is contained in the super page produced by the super page producing part, and a re-ranking part that grants a renewed page ranking to each of the Web pages by comparing the analysis results obtained by the super page analyzing part between the super pages.