The present invention relates to network management technologies for communication systems, and discloses a security management system, device and method for network management of communication devices, implementing a centralized, universal security management for network management in a communication network which includes network devices provided by various manufacturers. In the present invention, the network devices, that is, function entities, provided by different device manufacturers, are divided into different security domains; in each security domain there is arranged at least one security management gateway which is adapted to adapt a security management interface in the security domain to a universal security management interface. Moreover, there is provided a security management user interface to the security administrator. The security management system of the present invention runs through four work flows, i.e., user management, user authorization, user verification, and user authentication. Both the security management gateway and the function entities are logical entities.