1. A device for simulating 3D printing, comprising: one or more processors that process computer executable program code embodied in non-transitory computer readable storage media, the computer executable program code comprising: a 3D model texture data input program code that receives 3D model texture data of an object to be outputted through a 3D printer; a realistic preview data generating program code that generates realistic preview data by converting the 3D model texture data into color gamut mapping data based on display characteristic data of a connected display device and 3D printer characteristic data of the 3D printer; a rendering image generating program code that generates a first rendering image based on the 3D model texture data and a second rendering image based on the realistic preview data; and an output control program code that controls the 3D printer to output the second rendering image through the 3D printer.