The “Hospice Palliative Care Act” is specifically stipulated to respect only the terminal illness patients’ will on the medical treatment. Even though “Patient Right to Autonomy Act” has been enforced in 2019, considerable amount patients are ineligible to seek for relief through euthanasia or assisted suicide. While the wealthy could select suicide tourism, the ordinary people are waiting for death in pain with no alternative. The purpose of this paper is to locate a constitutional right to death, and discover the constitutional basis and limitation of Right to die. This research refers to the norms related to euthanasia of United States, Switzerland, Germany, Canada, India, United Kingdom, Netherlands and Belgium. Comparison and contraction of the norms from various countries to determine a hierarchical comparison model and frame a suitable euthanasia act for Taiwan.