The purposed of this research were 1) to study the components of factors affecting a Buddhist learning ecosystem in schools under Primary Education Service Area, 2) to develop a Buddhist learning ecosystem model in schools under Primary Education Service Area, and 3) to propose Buddhist learning ecosystem model in schools under Primary Education Service Area. Multiphase mixed methods research was designed by using quantitative methods to extend qualitative results. It was divided into 3 phases; Phase 1 qualitative research, the key informant was qualified person in education administration and were selected by purposive sampling of 12 key informants. Data were collected by interview form and were analyzed by using analytic induction. Phase 2 was a qualitative research, focus group discussion by experts who were academics in the field of Buddhist education administration qualified person in education administration using purposive sampling of 9 experts, data were analyzed by content analysis. Phase 3 was quantitative research by using a questionnaire to validate the Buddhist learning ecosystem model in schools under Primary Education Service Area. The sample group was determined by using a sample size of 10 samples per 1 number of paths showing the relationship between the variables in the model of all 45 paths. Therefore, the appropriate sample size should be 450 samples