One of the main problems of urban development is scattered growth and horizontal expansion, which causes problems such as the central areas of cities being deprived of the flow of development, vast lands remaining unused within the city limits, and the formation of unstable urban development. Therefore, it is important to control this development and direct it towards the lands inside the cities by using the intermediate development model in this field. In the city of Naein, the recent developments in the form of horizontal distribution have caused urban instability and the survival of parts of the inner city, including its historical context, from development. In addition, this city has obstacles for horizontal expansion in its surroundings and has many potential areas for internal development of the city. This research is an applied research in terms of its purpose and a descriptive-analytical research in terms of its method, and documentary and field methods were used to collect information. In this research, after identifying and determining the criteria and indicators of mixed-use development and localizing it with the conditions of Naein city, the TOPSIS multi-indicator decision-making technique was used using Excel software and the areas prone to mixed-use development were determined. Then, using the AHP hierarchical analysis process, using the Expert choice software, the areas prone to development were prioritized by determining and using the relevant criteria, and the results were overlapped and drawn using the geographic information system (GIS). In the end, the proposed patterns of intermediate development intervention in this city and the corresponding solutions have been formulated and presented. The obtained results show that the intermediate development model can be a favorable and efficient model for the future development process of Naein city as an intermediate and historical city. Also, the most suitable areas for intermediate development in the city are the buffer zone between Naein and Mohammadieh, the old Naein and Mohammadieh areas, the new area and finally the northwest lands of this city.