The paper proposes a geomorphic application of GIS-techniques on the basis of the combination of digital relief’s model and the method of relief’s plastics. The sequence procedure of such an approach, modernized techniques, technologies and software of geographic information computer technology are considered. This approach was tested on the basis of studies of the model polygon – Preolkhon region, located in the western Prebaikal area. The analysis of geo-information relief’s models was verifying on the built of mountain topography layers – structural, in origin of relief – genetic, as well as relict landforms. As a result, the regularities that could not be recovered by conventional field, remote sensing and laboratory research methods of relief and landforms.