On account of the influence of natural and man-made factor, there have been serious geological diseases in Dazu Rock Carvings. The paper expounded the application of geophysical technologies in the conservation of Dazu Rock Carvings, including high-density resistivity method, electromagnetic wave computerized tomography (CT) technology,borehole television technology and geological radar technology, and so on. The plane distribution rule of the main water bearing structures, the spatial distribution pattern of the aquifer, the distribution of the Quaternary overburden and the structural characteristics of rock masses which the rock paintings occurreto was ascertained through the methods mentioned above. A ideal results is achieved and provides the basis for the conservation of Dazu Rock Carvings.