An information processing system, for processing information obtained from multiple sites that are connected via the Internet 10, includes: a webcrawler 13, for crawling sites, across the Internet 10, which are registered in a registered site DB 11; a metadata DB 12, for storing metadata from which information elements are extracted from content referred to by using a URL; an important information element extraction mechanism 30, for reading information stored in the metadata DB 12, and for extracting important information elements based on the matching level of information elements; an important information element DB 40, for storing the extracted important information elements; and a result display mechanism 41, for visually presenting said stored important information elements.