This study was aimed to present a model for social responsibility of audit firms using the grounded theory method. To this end, the components and dimensions of social responsibility model of audit firms were identified and explained. The research method was applied in terms of purpose, mixed (qualitative-quantitative) exploratory in terms of the datatype, and descriptive-correlational in terms of data collection time. The statistical population of the qualitative part of research included experts and managers of audit firms and top professors in auditing in the country, among whom, 30 people were selected as sample size using purposive sampling method and saturation principle. The second group of the statistical population included all financial and audit managers of Shasta subsidiary firmas, among whom 145 people were selected as sample using relative stratified random sampling method. The results showed that the model of social responsibility measurement in audit firms has five dimensions of causal conditions (audit firm size, audit quality, auditor’s expertise, corporate size, audit fees and time budget), axial phenomena(trust, technical and comparability, willingness to invest, law-orientedness and business ethics), contextual conditions (internal controls, voluntary disclosure of financial statements, transparency of financial statements), intervening conditions (CEO’s personality traits, accounting conservatism, and political considerations) and consequences (financial development, information validity, information quality, trust and social participation, and corruption).