The doctor-patient relationship is an important issue that has been discussed for a long time in the field of medical ethics. The doctor-patient relationship is linked to different academic fields like psychology, sociology, jurisprudence, ethics and anthropology. The methodology of medical ethics is different from other disciplines in that it rationally applies moral critique and value judgment to the exploration of doctors' (medical people's) social responsibility toward patients (and their family) as well as the professional images and moral ideals the set for themselves. Through the discussion about the ethical category of the doctor-patient relationship, the writer introduces and estimates the doctor's multiple roles in this relationship, such as guardian, profession technician, consultant, teacher, friend, seller of medical service. The writer draws on the moral idealism and medical ethics of the traditional consultant, teacher, friend, seller of medical service. The writer draws on the moral idealism and medical ethics of the traditional Confucian ethics of Jen to correspond with the altruist ethics that represents the medical professional ethics in the western modern medical society. The writer seriously points out the importance and urgency of the education of medical ethics in a society where medical system craves for improvement and consumerism prevails. From the perspective of medical education, medical practice is a loving and helping profession that cares about the patient's life and death, pains and diseases. While studying outstanding professional medical medicine, the medical people should also cultivate their profound concern about human life as well as their compassion for human illness and suffering.