2. The page re-ranking system described in claim 1 , wherein the covering degree of the topic representation contained in the super page of one of the multiple Web pages is a similarity degree or a difference degree concerning the topic representation between the super pages of the multiple Web pages.
3. The page re-ranking system of claim 2 , wherein the similarity degree between the super pages of the multiple Web pages is calculated by the following equation, HR j = ∑ i = 1 W ⁢ ⁢ [ cos ⁡ ( VS i , VS j ) * ( 1 + ɛ * W - R i SE W ) * ( 1 + κ * 1 Age i ) ] where HR j is a historical similarity degree of a Web page j, cos is a cosine similarity, VS i is A vector of the super page of a Web page i, VS j is a vector of the super page of the Web page j, R i SE is the search engine ranking of the Web page i, ε and κ are parameters, W is a total number of URLs as being an object to be re-ranked among a number of URLs of the search result obtained from the search engine, and Age i is an age of the Web page i.