Starting from a speckle model of the scattering object and giving consideration to etatistical nature of speckle phenomena, the recording process of specklegrams with monochromatic incoherent light and white light illuminating is discussed.The relationship between monochromatic light speckle and white light speckle is explored .Quantitative description is given for the effect of he frequency content of the scattering object and the photographic aperture on the spatial frequency of specklegrams.Theoretical analysis and experimental demonstration are also presented.