The aim of the present study was to present a social data-based model of Iranian school-building benefactors. To conduct this applied research, a qualitative method and a data-based theory strategy were used. The field of study was all key informants, experts and scholars in the field of social capital and members of school-building benefactors, 16 of whom were interviewed using a purposive sampling method and a theoretical strategy. The research tool was a semi-structured interview. To analyze the qualitative findings, an open, axial and selective coding method was used. The results of the research showed that "social capital of school-building donors and social participation of donors" were proposed as the central categories, "attracting talents in the school-building donors' assembly, accountability, knowledge management and motivation" as causal conditions, "continuous monitoring and organization, strategic plan, interaction and communication and technology-centered" as strategies, the categories of "donor group and people's and donors' beliefs and attitudes" as the context, "cultural environment, political-legal factors and economic factors" as intervening conditions. Attention to the social capital of school-building donors has positive organizational and social consequences. The paradigmatic model of the present study can contribute significantly to the development of social capital and the improvement of trust and social participation of school-building donors and to the growth of culture, improvement of educational quality and justice, and scientific progress of the country.