X-ray fluorescence holography is a novel microscopic imaging method, which can provide the information of three-dimensional atomic arrangement in a single crystal. However, obvious twin images apperar on the cetomic images dotained by this method. Therefore, the method called “multiple-energy X-ray hologrophy” that images reconstructed from holograms recorded at several incident energies are combined properly is used to remove the twin images. In this work, a single Fe atom and multi Fe atoms as model respectively, holograms recorded in a complete 4π solid angle with different range and magnitude of incident energies are calculated. Compared reconstructed atomic images from these holograms, it is found that the wider range of incident energies, the better effect of removing twin images is. Moreover, the difference between simulated peak positions and actual atomic positions decreases and the resolution of reconstructed atomic images increases with increasing incident energy.