Based on the considerations of two kinds of documents, those from the "Symposium about the environmental problem (1992)" and current several leading textbooks of environmental science, I picked up three kinds of antagonism in the epistemology of science: objectivity vs. subjectivity, analysis vs. synthesis, and value-neutral vs. value-oriented. "Modern science" has emphasized the left-side of these binary oppositions, rejecting the right-sides. However, our considerations suggested that the underlying epistemology of the environmental science stands on the right side: subjectivity, synthesis, and value-oriented. I ended this paper by emphasizing that more detailed considerations of the problem of subjectivity are necessary for the development of environmental science.