The progresses of health behaviors and medical institutions have been seen as an important social reality for the developments of modern society. The purpose of this article is to recognize the analytic, critical discourses of medical ethics, and illuminate the possible images of the praxis of medical ethics. Physicians feel frustration and pessimistic for the practice of clinical ethic because of the various reasons including norms of National Health Insurance Institution, patients' needs, and hospital's management and so on. The "ethical dilemma", "harmful effect of patient-physician relationship" seems reveal the difficulties of medical practice for the physicians. "Medical righteousness" refers to a conceptual constructions, the aim is to comprehend the ways and mechanisms of Taiwan's medical field's operations. "Base on praxis and refers to praxis" is the main problematic, illuminating the practical forms of "medical righteousness" and overall concerning the praxis of medical ethics.