1. A distributed printing method of a powder-bed 3D printer, the method comprising: a) generating, by a processor of the powder-bed 3D printer, a color image for a printing layer, wherein the color image comprises color information; b) generating, by a processor of the powder-bed 3D printer, a non-color image for the printing layer, wherein the non-color image comprises adhesive information; c) calculating replacing information through an adjusting module of the powder-bed 3D printer, and comprising: c1) analyzing distributed positions of adhesive distributed in the printing layer according to the adhesive information; and c2) calculating the replacing information based on the distributed positions of the adhesive through the adjusting module, wherein the replacing information indicated multiple adjusted target positions, and the adjusted target positions are overlapped with parts of the distributed positions of the adhesive; d) adjusting the adhesive information of the non-color image according to the replacing information for generating adjusted non-color image; e) adjusting the color information of the color image according to the replacing information for generating adjusted color image; f) generating a final printing image via combining the adjusted color image and the adjusted non-color image, wherein the final printing image is used by the processor for respectively controlling an adhesive nozzle of the powder-bed 3D printer to jet adhesive and controlling multiple color nozzles of the powder-bed 3D printer to respectively jet corresponding color inks; and g) executing printing according to the final printing image.