1. An apparatus to manage a multimedia-information-configuring graphical user interface (GUI), the apparatus comprising: a storage to store a mapping information table in which a state of a widget and an action mapped to the state are stored, a current state table in which a current state of the widget is stored, and an antonym dictionary that only includes one or more states that are incompatible with the current state of the widget; an input unit to receive GUI-setting data to set a configuration and an operation of the widget; and a control unit to generate the mapping information table by parsing the GUI-setting data, to search the mapping information table for the action using the current state table, and to perform the action found by the searching.