The Western Yunnan Earthquake Predication Test Site set up by the China Earthquake Administration,the National Science Foundation Commission of America,and United States Geological Survey has played an important role for development of the early earthquake research work in China. Due to various objective reasons,most of the predicted targets in the earthquake prediction test site have not been achieved,and the development has been hindered. In recent years,the experiment site has been reconsidered again,and renamed as the "earthquake science experiment site". Combined with the current development of seismology and the actual needs of disaster prevention and mitigation,it increased the "underground cloud map" as the new direction of the experimental site,which is discussed in this paper. Using high levels of repeatability,environment friendly,high security airgun source,continuous excitation of seismic signals,it can realize the continuous monitoring of the velocity change of underground medium. Combined with background noise imaging,the high-resolution 3-D crustal structure can be obtained,and the 4-D(3D space+1D time)underground structure imaging can be constructed. The "underground cloud map" can reflect underground velocity and stress changes,providing new means of business for the national earthquake monitoring forecast,which will advance the conversion of earthquake prediction from experience to physical prediction.