A network switch, a device management system, and a device management method thereof are provided. A network management system with a graphical management interface is embedded in the network switch, so that network administrators can use web browser for management. The graphical management interface provides a topology mode, a floor mode and a map mode for the network administrators to intuitively manage Internet Protocol (IP) connected apparatuses on a topological diagram, a floor plan or a map. Furthermore, in response to a control operation corresponding to the IP connected apparatus on the graphical management interface, the network switch performs a device function operation (e.g., an information collecting operation, a configuration setting operation, a node searching operation, a system login operation, etc.) corresponding to the control operation through a communication module thereof. Accordingly, an innovative and convenient device management system can be provided for the network administrators.