In this paper, a holographic imaging method in a water mist environment is proposed. Firstly, an infrared laser with a wavelength in the “atmospheric window” is adopted, and the fog environment is simulated through experiments to investigate the effect of different fog concentrations on the holographic imaging effect of infrared light, and set up a visible light digital holography experiment for comparison. By comparing different image quality evaluation parameters of the reconstructed images of infrared light and visible light, the results show that the system can be clearly imaged by infrared light, while the visible light digital holography system has poor imaging performance. In addition, since the holographic reconstruction of infrared light through water mist is seriously affected by the zero level and scattering, the hologram reconstruction obtained in this paper is processed by eliminating the zero level and enhancing Lee filtering to remove the noise, in order to achieve the purpose of improving the image quality.