a device of color 3d printing and the method thereof are disclosed . the method is adapted to print a color 3d part . the device of color 3d printing at least has a print bed and a print head . the method includes the steps as follows . a solid model of the color 3d part is established , wherein the solid model at least consists of plural points and a color data for each thereof . a temperature / color table for a plastic material is then established . the table consists of plural heating temperatures for transforming the plastic material to specific colors respectively . the coordinates and color data of each point are obtained according to a predetermined sequence . the positions of the print bed and the print head are controlled according to obtained coordinates . the plastic material is heated according to the color data and the temperature / color table and is printed by the print head .