The invention discloses a computer network information management system, which belongs to the technical field of computer network information management, aims to solve the problem of how to increase the safety of user files and how to solve the problem of pop-up advertisements, and comprises a server, a storage module, an advertisement interception module, a network diagnosis module, a fault maintenance module and an information encryption module; the advertisement interception module comprises an interception unit, a display unit and a software recommendation unit; advertisements popping up in a computer are intercepted through the interception unit; the advertisements popping up in the computer are very annoying for a user and if sensitive information pops up when a user is absent, and the sensitive information is seen by colleagues and family members, the user feels embarrassed, so that advertisements popping up in the computer needs to be intercepted; software is recommended to a client through the software recommendation unit, the software is unloaded after the advertisements are intercepted, and the software which does not have pop-up advertisements is recommended to the client according to the information of the unloaded software.