A device and method for managing information data in a mobile IP-based mobile telephone. The device and method employ an embedded web server for displaying a homepage of the mobile telephone on a web browser when linked to the mobile telephone through the web browser; and a program of server driven by the embedded web server to generate a command to enable communication between the mobile telephone and a telecommunication system using the web browser and to transmit a message confirming that data updated in the web browser has been updated in the mobile telephone to the web browser. The homepage of the mobile telephone is adapted to display information management menus of the mobile telephone and includes a language pack that stores at least one language so that the information management menus can be displayed in any selected language. The system and method further employ a memory for storing data of the information management menus.