Whether a baby with severe malformation and lifelong self-care can take the initiative to take euthanasia or passive treatment to let him die naturally. In ethics and jurisprudence, it involves not only the basic human rights of both parents, but also the society as economic burden, population quality, and bioethical evaluation of the entire society. On the ethical analysis, it is necessary to distinguish between abnormal euthanasia and negative treatment of abnormal infants. The former is an active nontherapeutic measure and the latter is a legal treatment. Recent legislation should first specify the specific conditions and procedures for negative medical measures for abnormal infants. After legislating the euthanasia of adults, it is confirmed that the euthanasia of the babies is legal, because the legal treatment involved in the negative treatment of the babies is more complicated. In the future, the Civil Code should be clearly affirmed that its negative treatment is legal.