Abstract: A neural network method for the color conversion from CIE colorimetric values to RGB control signals for color digital hardcopy devices is presented.Based on the color transfer mechanism of the making equations,the color conversion can be performed by introducing the colorimetric density variables.A BP neural network is utilized to achieve the three-dimensional transformation from the synthetic to analytical colorimetric densities.And then the analytical colorimetric densities are translated to RGB values by three one-dimensional computations.Experiments were carried out on several color devices.Compared with the conventional 3D_LUT color conversion,the network method had a close mean and much more lower maximal errors.