In this paper, a new color LCoS (liquid crystal on silicon)-based holographic full-color 3D display system is proposed. As the color LCoS SLM (spatial light modulator) can produce a full-color image pattern using a color wheel, only one LCoS panel is required for full-color reconstruction of a 3D object contrary to the conventional three-panel method. That is, in the proposed method, each color fringe-pattern is generated and tinted with each color beam. R, G, B fringe-patterns are mixed up and displayed on the color LCoS SLM. And then, the red, green and blue fringe patterns can be diffracted at the corresponding status of a color wheel, so that a full-color holographic image could be easily reconstructed with simple optics. From some experiments, a possibility of implementation of a new LCoS-based holographic full-color 3D video display system is suggested.