An apparatus and a method for configuring an idle screen, and more particularly, to an apparatus and method for analyzing functions of a terminal according to a user's environmental state, and configuring an idle screen in accordance with the analysis. According to the apparatus and method, when a change in a current environmental state is sensed while performing the selected terminal function, the terminal determines an environmental state information item corresponding to a changed environmental state, and updates the selected terminal function in a terminal function item corresponding to the determined environmental state information item. When there is a request for displaying an idle screen, the terminal determines a current environmental state item corresponding to the currently environmental state, extracts one or more terminal functions corresponding to the determined environmental state information item, and configures the idle screen using the extracted terminal functions.