The present study investigates environmental education (EE) before and after Iran's Islamic Revolution. The research method is case study, and among the case study methods, historical analysis has been used in this research. A wide array of sources were employed, from government performance reports to documents, records, books, and articles published by Iranians. Environmental education in Iran was initiated with the establishment of a specific office for EE in the Department of Environment in 1972. During the years 1997-2005, the Islamic Republic of Iran enjoyed an era of unprecedented economic, social, and political advancement and growth. This fundamentally renovated EE in Iran. Today, observing EE's evolution in the Islamic Republic of Iran is quite informative. The paper examines the overall situation, major projects, and policies.