In this study a comparative analysis is conducted to evaluate TLSF(Teaching and Learning for a Sustainable Future) program, which is a module type environmental education program developed by UNESCO, and the Korean environmental education curriculum. The Korean environmental curriculum is mainly focused on conceptualization and the matters of fact. As a result, students may not be able to acquire contextualized and synthesized views on the environmental problems. The Korean environmental curriculum hardly supplies ample variety in the methods of teaching, learning and assessment, or the theories characteristic of the environmental education. Thus it would not make a useful material for teachers to reorganize various materials to be applied in class. TLSF program would be useful for a teacher to use in the environment education field because it supplies not only many various activities and samples for constructing a proper program but also the theoretical base and examples for education and assessment strategy. Finally, TLSF also offers the theoretical base of the environment education for the assessment, and it makes the best use of feedback from the environment educational field for improving its own quality. In conclusion, this study can be a meaningful preview for those who are involved in the process of developing of a curriculum, which consists of steps like formulating theories for developing a curriculum, organizing the curriculum contents, activating and evaluating a curriculum.