A method of producing a decorative molded object which is a resin molded object decorated with a color design image representing a letter, a symbol, a figure, or the like, includes the steps of printing a color design image on an image carrying layer with an output apparatus that collectively outputs color design data to form a coloring agent layer for displaying the color design image on the substrate sheet, transferring the coloring agent layer on the substrate sheet onto a resin molded object to be decorated, peeling the substrate sheet with the transferred coloring agent layer left on the resin molded object to form a color design image layer on the resin molded object and curing, after application and deposition onto the color design image layer, a transparent resin liquid to thereby form a transparent resin layer.