This research aims to study environmental literacy, environmental awareness and the concept of adaptation to global warming of students at Mahasarakham University Demonstration School (Secondary) and compare environmental literacy, environmental awareness and concepts that lead to behavioral adaptation to global warming used by Environmental literacy test, Environmental awareness questionnaire and the concept of adaptation to global warming questionnaire. The sample was 100 high school students. The research found that the students had environmental literacy in natural resources and the environment in moderate, literacy of ecology is high. but have a low level of literacy of environmental issues but have a low level of literacy of environmental issues. The students had a high level of environmental awareness of the overall and concepts of adaptation to global warming as a whole of students found that is at a very high level. The knowledge comparison of environmental awareness and the concept of adaptation to global warming of students. It was found that students of different sexes had environmental literacy, environmental awareness, and the concepts of adaptation to global warming as a whole the difference was statistically significant at the .01 level. It can be seen that the management of learning about the environment is important for environmental literacy students environmental awareness and global warming concepts. Therefore, if students want recognize the importance of environmental problems and global warming have a correct understanding by emphasizing the integration of learning management and activities. can be developed environmental literacy, environmental awareness and behavioral changes in adapting to global warming.