Infrared spectrum fusion simulation method and system

The invention provides an infrared spectrum fusion simulation system and method. The infrared spectrum fusion simulation system comprises a spectrum simulation channel, an image simulation channel, a beam combiner and a collimating lens, a light path is spatially divided into an image simulation channel and a spectrum simulation channel, the beam combiner 7 reflects light beams from the spectrum simulation channel and transmits the light beams from the image simulation channel at the same time, and information of the two channels is output through the collimating lens after fusion of the information of the two channels is completed. The device is mainly used in the field of optical guidance control semi-physical simulation, the simulation function of image information and spectral information can be achieved by controlling the gating mode of the micro-fast gate array, the light path structure is simple and compact, the detection response speed is high, and meanwhile the device has the advantage that a spectra