To provide an information providing method and a system therefor capable of providing optimal information by following a change even if the interest and taste of a browser change together with time series.

When providing a document for the browser by extracting the document from a document database recording a plurality of documents, when there is a document presenting request from a browser terminal 1, a presenting document determining means 9 calculates similarity between the requested document and the respective documents in the document database 4, and determines a document to be presented to the browser in the next place on the basis of the similarity and a browsing result of the respective documents. A WWW server 3 provides the determined document for the browser terminal 1.