Data was collected from 403 primary school administrators in Maha Sarakham Province, Thailand, to develop causal relationship model of Administrator Characteristics (AC), Teacher Characteristics (TC) and Environmental Education Principle (EE) that affect Environmental Education Strategy (EES) through Inspiration of Public Mind for Environmental Conservation (IPM). Results revealed that AC, TC, and EE explain the variation of endogenous variables of IPM to cause EES at 0.92. IPM had highest direct effect to EES at 0.69. All exogenous variables were able to explain the variation of IPM at 0.96 and EE had the most effect to IPM with effect of 0.86.