The crises of water, air, soil, and ecological deterioration happens globally. In addition, Taiwan can no longer stay out of it. We need to rehabilitate our living environment gradually. We need to examine the myths and deficiencies of many "conventional farming methods," fundamentally, such as the inertial thinking that only a large number of single crops can be economically beneficial. In addition, the use of chemical fertilizers and pesticides can increase output. The case study explores a circular eco-agriculture model that takes into account both the "survival environment" and "agricultural productivity" in this article.