A nonuniform quantization encoding method for Fourier transform digital holography is proposed. The generated digital holography in quantization noise power aspect has been analyzed and compared with the uniform quantization holography. The simulation results show that the nonuniform quantization method can bring lower quantization noise power and better quality of the reconstructed image under the condition of the same encoding bits. A clearer digital reconstructed image can be retrieved from the carrier image embedded with nonumiform quantization digital holographic watermark when suffered from the same intensity of the Gaussian noise or salt and pepper noise. The similar robustness is also shown in anti-cropping and anti-JPEG compression performance. The proposed method can be used in the pre-processing stage of the holographic watermark in information hiding application or digital storage, transform and processing of the hologram, etc.