A panel assembly for decoration glass is disclosed herein, which is to be attached to a side of a pane of transparent glass. The panel assembly includes a panel piece and at least one embedding piece. The panel piece is a thin plate and has at least one through hole. The embedding piece is corresponding to and fitted in the through hole. The embedding pieces are configured as a pattern or a character and have various colors. When the panel assembly is attached to the glass, it gives the glass a vivid appearance. The individual embedding pieces or the whole panel assembly may be replaced with other colors or patterns to make the glass present a diverse appearance.