In this paper, the general concept of utilizing geomorphological approach to assess the stability of natural and man-made slopes are covered. This approach is based on the effective combination of geological and geotechnical field works and site verification using geotechnical primary data capture form (proforma), reliable site tools and topography survey data. The developed proforma can be used in the landslide inventory survey. By using this approach, the geological and geotechnical parameters such as instability factors, landslide processes and mechanism of slope failures can be identified. This led to a thorough assessment of the slopes. The investigations based on this methodological approach has allowed for an adequate consideration of the multiple factors affecting the stability that can be used in the design of the slope remedial works, geotechnical stability analysis as well as slope inspection and maintenance works.