Abstract: According to the study, green roofs also benefit their surrounded environment. It has been accepted as a sustainable built environment for both microclimate and macroclimate. The analysis of environmental benefits extensively considered from the emission in the production process, air quality improvement, carbon reduction, habitat creation, mitigation of urban heat island effect, reduction of flood risk, infrastructure improvement, recreational space and increase surface function for human well-being. This study had studied the environmental benefits of intensive green roofs, extensive green roofs and air plant green roofs. The review from secondary data showed the data of environmental benefits from intensive green roofs and extensive green roofs. The environmental benefits of air plant green roofs had been measured under the similar environmental circumstance in hot and humid climate in Thailand. The Crassulacian Acid Metabolism (CAM) or xerophyte and epiphyte plants were selected and used in the air plant green roof. It was found out that those plants required less maintenance. However, two common species of CAM plants in this study are air plants which are Spanish moss and Tillandsia cotton candy. With that reason, the classifications of green roofs have been represented by different environmental benefits. Therefore, the consideration of environmental benefits of green roofs is indispensability and supports the decision making for the utilization of green roofs.