Having a shelter has been of The utmost importance to humans. Humans Have been developing all kinds of residential buildings to protect themselves, one of them is courtyard houses. When examining the form of a house. One of the critical reasons for prioritizing the study of indigenous buildings is the belief that social and cultural factors greatly contribute to the form of a house. In this article, the content analysis method with the help of data foundation theory, open, axial, and selective coding methods have been used. The strategy of this article in the analysis and judging stage is both quantitative and qualitative method. to investigate the reasons for the formation of the central courtyard from the perspective of culture in the city of Hamedan, the impact of the entrance and the central space of houses and their halls have been studied in general. Based on the results, the Iranian architectural methods and the cultural elements in the indigenous architecture are considered to have played a decisive role in the formation of the of architectural model of the Qajar and Pahlavi period. In these houses, an attempt has been made to separate private and public spaces through designing the open space of the yard as a coordinator between the outside and inside space to maintain the identity of the other spaces and to prevent any disruption in using them. Manuscript profile