The city of IzadKhast due to its proximity to the ancient highway of Isfahan-Shiraz, the existence of special topology and of course diversity in the artificial environment has qualities that increase the importance of investigating its residential architecture. Accordingly، the aim of this study is to determine the typology and features of the man-made architecture in the city of IzadKhast. During preliminary survey research, it was determined that the city was formed in a dense area with different geographical features and its inhabitants tended to build different residential species. Therefore, two preceding questions arise: 1 IzadKhast - What are the causes of the formation of diversity in the residential architecture of the city of IzadKhast ؟ 2- What is the shape of the typology and features of its residential architecture? Initially, the study was applied to morphology of natural conditions in the region by qualitative geomorphological method. In the findings of the study, it was found that the existence of natural factors such as alluvial valley, wall perpendicular to this valley, high natural hill in the middle of it, the existence of river and sloped bed as well as the flat plain of hand balālī has had an effect on formation and diversity in the artificial environment of the the city of IzadKhast. This diversity of texture is divided into Bukand، Tepe Qaleh and Zirdeh - Baalde according to the local dialect. Based on the findings of the first stage، typology and characterology of residential architecture of this city was investigated by a qualitative typomorphological method، which resulted in the design of eight identifiers which are؛ 1- mass (house) 2- geographical orientation 3- passing along the entrance 4- fan construction 5- open space 6- semi-open space 7- enclosed space 8- stairs. Finally، the findings of the research led to the introduction of three residential architecture in the form of 1- Bokank؛ one storey species 2- Tape qale؛ species more than two floors 3-subde-baalde؛ the two-class species was introduced and documented.