Abstract: As the thermal conductivity of sedimentary formations is stable throughout the periodof sedimentary evoltition,it can be regarded as a constant. With a premise of invariable offluid property,the thermal conductivity of cemented rocks changes only with the variationof porosity and temperature,By the comptiter modellings on thermal history and sedimentary history,the thermal conductivity of rocks in different times can be inversed and imaged obtaining the images of thermal conductivity in varing times and depths, In this paper, the authors discuss the imaging method of thermal conductivity according to the fission track of apatite and the data of vitrinite reflectivity and suggest a theoretical model ofimaging using vitrinite reflectivity.