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In the application of geophysical prospecting, detection instruments on the surface or downhole are often used to measure specific physical quantities, such as: electric field and magnetic field, seismic wave travel time, etc. Then reverse the calculation to know the physical properties of the material inside the earth, such as: electrical conductivity, speed, etc. The physical characteristics of the underground substances are obtained through inverse calculation, and then through rigorous data processing, analysis, interpretation and interpretation, and finally comparing multiple pieces of geophysical data, we can know what the specific substances in the underground are. In addition to prospecting and civil engineering, its application fields can also contribute to environmental pollution detection, geological structure change monitoring, etc.Traditionally, the geophysical method for probing the density structure of structures is gravity prospecting. Although gravity technique has its advantages, it has the disadvantage of not being able to resolve detailed density structures. If you want to explore the detailed density structure distribution, you must increase the coverage of the survey points. If the terrain to be explored is rugged, it is extremely difficult to increase the coverage of the survey points. In recent years, muon imaging technology has emerged. By observing the muon rays from the universe, through the attenuation characteristics of geological materials of different densities, the density structure distribution of materials can be inversely deduced. There are two advantages of muon imaging. One is that the place to observe muon rays is elastic, because what is measured is the flux of muons after passing through matter, so it is not necessary to observe near the target object. The second is the resolution. When the division of the circuit board components for detecting muons is finer, the flux of muons in a finer direction can be measured, so that the inverse analysis of the density structure has a better resolution.The main purpose of this project is to develop the inversion method of muon imaging. It is hoped that it can be used as a tool for geophysical prospecting methods in the future to make up for the deficiencies of other geophysical prospecting methods.