An apparatus and method for displaying graphic user interface (GUI) in a variety of states includes combining effect images and chroma key layers to which color codes are applied in multi-layers. More specifically, the GUI display method includes: loading a chroma key image of a certain shape for a GUI; applying a color code corresponding to the GUI to the chroma key image; creating a GUI image by combining an effect image corresponding to the GUI with the chroma key image to which the color code is applied; and displaying the GUI image.