This paper aims to explore a feasible and desirable approach to the education of environmental ethics. In order not to be lost in the very broad scope of environmental ethics, the author focuses on the issue of animal welfare. By examining the arguments related to the issue of animal welfare, this paper reveals the complexity and dialectics involved in the ethical decisions related to environmental issues. There are two main debates to be presented: the debate between Singer's animal liberation and Regan's animal rights, and the other between holism and individualism. The examination of the two debates provides a very good reference for analyzing and rethinking our current educational practice found in the current curriculum guidelines. The exploration of this issue sheds light on the future improvement of the present education.