The condition of underground basic rock and the location of cavern site can be found by means of seismic surveying is one of the physical exploration methods by which the prelimirary investigation of underground storage constructions are made in order to maximize the use of a land. This study is valuable in the point of showing a method for the decision of the property of a underground facilities estabilishment, by analying the elastic wave velocity and the distribution of a lower velocity zone and by grasping the weak zone of the basic rock.