Perception is a process based on the combination of sensory information and expectations based on experience through which a person selects the necessary data based on his needs from his surrounding environment. Cast shadow, as the concept of light passing through the architectural form, plays a very important role in the viewer's understanding of the building. This research is of a descriptive-analytical type, which has a development aim, but its fundamental characteristic can be pointed out, especially in explaining the depth of the theoretical foundations, the proposed model and framework. The method of collecting information was library and survey, and sampling was also used. With the purpose of expressing the role of shadows in the perception of architecture, this research tried to express the factors and indicators that are effective on the perceptual process, and after examining the basic structure, factors were extracted as the result of the research framework and using the Delphi method as the final indicators. A proposal is presented in the form of a structural model. Finally, it was found that the indexes of volumetric structure, time, roughness, and depth have the highest scores with an average of 5.96, 5.30, 5.21, and 5.20, respectively, and as a result, they have the greatest impact. In future researches, methods such as HSE , it was used to examine the qualitative states of the respondents as well as the type of interview and its testing and evaluated its results in a specific architectural building.