The locations and peak intensities of hot images are compared under high flux density when the damage point is located on the front surface and rear surface of upstream medium respectively. The phenomenon of alternate arrangement of hot images and variation rule of peak intensities with damage point size are discussed. For the fact that the damage point in upstream optical components is the major factor to induce hot images in subsequent optical path, the hot images prejudging technique is proposed, and the analysis object of which is diffraction rings image introduced by damage point propagation for a certain distance. This technique extracts the feature information of diffraction ring images by using gradient direction matching method with high signal-to-noise ratio and then calculates the diffraction distance and the size of damage point inversely. The diffraction images of single equivalent damage point produced by liquid crystal spatial light modulator is used to demonstrate the effectiveness of the proposed method. The capability of suppressing noise interference and its spatial resolution are analyzed by using the diffraction ring images caused by the actual damage point on the optical components, when multi-damage points are inversed by the proposed method.