Updated information presenting software creates a list of information source URLs provided with the index of importance determined by the frequency of access to the referring URLs in the past, and selects an information source URL with a high index of importance by an information source URL sorting section, and obtains data from a server computer by a network file access section. A file comparing section detects whether the contents of the data have been updated, and, when a tag information change detecting section detects a new link and a changed anchor character string, an output formatting section creates output HTML which displays the new link and the changed anchor character string together with the information source URLs in order of the index of importance and supplies the output HTML to a browser.