The objective of this paper is to investigate the development of Silhak as a Korean epistemology, to investigate the implications of Silhak in Korean society, and to discover further environmental implications. The main discussion of this paper concerns with the epistemology of environmental philosophy. Epistemology is based on the justification of certain knowledge and social philosophy. Epistemology, from the Greek words episteme (knowledge) and logos (word/ speech) is the branch of philosophy concerned with theories of the sources, nature, and limits of knowledge. Since the seventeenth century, epistemology has been one of the fundamental themes of philosophers, who were necessarily obliged to coordinate the theory of knowledge with the development of scientific thought. It is a general belief that Western ideology is substantially embedded in Eastern ideology due to physical and metaphysical colonial involvement. We argue that ecological crisis may be resulted from western epistemological mechanical view, thus we suggests a Korean epistemology as an alternative. In this paper, we seek possibility of epistemological alternative of nature in the Korean traditional epistemology incorporating the epistemology of Sung confucianism and The Silhak.