By analyzing the innate character of holographic record,this paper points out the image of the original object is exactly reconstructed only when the reconstructing light is the reference light and inverse reference light.Otherwise the distortion of reconstructing image emerges,and it came from the wave aberration.In order to decrease the wave aberration,we propose to use the parallel light as reference light,and reconstruct the master hologram by using the inverse light road. In this paper,we also gives out the light road of two steps making method for reflecting and embossing holograms.points out the influence of the wave aberration for holographic interfermetry and 3D shape measurement.