A robust transformed domain watermarking algorithm is proposed. The host image of RGB mode was split to channels, than conversed to transformed domain using DCT. Both Fourier hologram and SVD were used to improve the bad anti-filtering ability and irresistible rotating ability of traditional holographic watermark. Simulation results indicated that this algorithm can satisfy the visual quality demand of color watermarked images, and the correlation between reconstructed watermark and original watermark is high; the watermarking algorithm is able to resist common attacks and takes the robustness, security and invisibility all into account. So it has important practical significance in the field of copyright protection and information hiding.