An application component operating method for an SDR terminal in which a plurality of application components are installed on middleware is provided. The method includes: configuring an essential application component commonly required for wireless access services; when a mode change between wireless access services is required, searching for an optional application component for supporting a desired wireless access service; when it is determined in the optional application component search step that the optional application component does not exist in the SDR terminal, downloading the optional application component; and configuring an application component by the essential application component and the optional application component for supporting the desired wireless access service.