In this study, visual quality analysis of Ilgaz Devrez Sub-Basin was performed using the method based on the Visual Resource Management System model developed by the US Land Management Bureau. Ilgaz Devrez Sub-Basin, which has been selected as a study area, includes protection areas, recreation areas, winter tourism areas and is open to human-induced deterioration due to these features. The visual quality study consists of two stages. In the first stage, the areas were scored on slope map, the color map and vegetation map obtained from the corine land cover map and a visual quality map was created by overlaying these maps in the GIS program. In the second step, 8 observation points were determined of different qualities, which received different scores on the visual quality map. At these points, on-site observations were made, the perceptual aesthetic form and source observation forms were filled, a new scoring study was made by landscape architects. The second stage study was compared with the first stage study and the error rate was minimized. As a result of the study, the study area evaluated in terms of visual quality was determined as a high visual quality area with an average score of 3.7 out of 5.