An information processing system includes a plurality of first information processing apparatuses, each of the plurality of first information processing apparatuses being configured to add search information and post content, and a second information processing apparatus for holding the search information matching the content posted from at least one of the plurality of first information processing apparatuses. Upon receipt of a request to provide the content which is previously retrieved from one of the first information processing apparatus, the second information processing apparatus performs another search based on a search condition stored at a last search by the second information processing apparatus itself or by the one of the first information processing apparatuses, and provides the content which is newly retrieved to the one of the first information processing apparatus in response to the request.