An information processing system formed by connecting an information processing apparatus with terminal apparatuses includes a delivery unit delivering information received from the terminal apparatus to the other terminal apparatus; a display unit displaying the information exchanged between the terminal apparatuses; a user detection unit detecting whether the user exists before the other terminal apparatus in a case where the information delivered from the terminal apparatus is displayed in the other terminal apparatus; a report unit sending a report indicating that the information delivered from the terminal apparatus is browsed from the other terminal apparatus, which detect that the user exists, to the terminal apparatus and not sending the report from the other terminal apparatuses, which does not detect that the user exists; and a display control unit of the terminal apparatus displaying a browsed state of the information in the other terminal apparatuses based on the report.