Abstract: A homepage searching method uses a similarity recalculation based on a URL substring relationship. An entry point of a homepage is searched among a plurality of web documents belonging to the homepage by using their substring relationships. The technical essence lies in that the present invention uses a principle that if a URL of a certain web document is a substring of a URL of another web document, the former is more likely to be an entry point of a homepage than the latter. Thus, the present invention improves a conventional information searching method and allows a page serving as an entry point of a homepage to be searched prior to other documents. Accordingly, a user can determine whether a searched web document is a homepage or not without visiting all the URLs of the searched web documents.