The spiritual preservation of the families of Pasdaran (Islamic Revolutionary Guard Corps) plays a pivotal role in strengthening the social and cultural foundations of society. This study aimed to design a model and measurement tool for assessing the spiritual preservation of the families of Pasdaran based on the Supreme Leader's ideological framework. Utilizing a qualitative research method and thematic analysis, data were first collected from the Supreme Leader's statements and expert interviews. Based on this data, a conceptual model of spiritual preservation was developed, and a measurement tool was devised. Using the method of qualitative research and thematic analysis, first, data was collected from the content of the Supreme Leader's statements. Then, based on the data analysis, 430 basic themes and 83 organizing themes were deduced from the content of the selected propositions, and a conceptual model of spiritual protection was designed. The findings revealed that the key components of spiritual preservation include religious foundations, ethics-centeredness, strengthening family relationships, and addressing cultural challenges. The proposed model outlines a process of identifying contextual factors, barriers, strategies, and outcomes of spiritual preservation. Additionally, the designed measurement tool demonstrated high validity and reliability. This study can significantly contribute to institutions involved in enhancing the spirituality of the families of Pasdaran.