科技曾經克服許多自然災害，它預報颱風、防患水災、控制饑荒、降服瘟疫、延長平均壽命，換言之，科技降低了人類生活中的「自然威脅」。然而，科技卻也帶來大量人為災禍、污染物、藥物毒品、高效率的殺人工具，並使得一瞬間且大規模的意外死亡變得輕而易舉。科技為我們帶來一個新型態的「風險社會」（risk society），讓我們時時過著一個「風險生活」（risky life）。科技社會下的每個人，都不可避免地成為死亡的「冒風險者」（risk-takers）。本文希望探討在這樣的科技風險社會中，我們又該如何面對科技帶來的意外死亡？如何看待科技在這風險社會中的發展？從這些問題的追問中，我們希望提出風險生活中使用科技的道德原則，以及展望一個「風險生死學」的可能性：包括生死學的基本課題、意外死亡的獨特性、死亡風險的概念和科技導致死亡的風險評估方式。 人類的死亡，可以根據致死原因而粗分成四種：即自然疾病死亡、意外災禍死亡、自殺、他殺（包括個別性的謀殺與集體性的戰爭屠殺）。當前對死亡議題的探討，似乎針對死亡本身，一體適用於不同的死亡類型。但其實被思索的主題多半預設自然疾病死亡。偶而論及自殺。意外災禍死亡和他殺很少成為探討的焦點。 車禍、墜機、海難乃是典型的意外災禍；被鎗殺、被各種炸彈炸死則是當前他殺的主因。只要我們將眼光投向這類死亡，稍加檢視，我們就會發現它們大半為某種科技產物所造成的。換言之，科技增加了這類死亡的風險。如何將傳統生死學的視野擴張到科技導致的死亡風險之上呢？這就是本文致力的課題。

Scientific Technology has been ever eliminating many natural disasters. It predicts the tract of typhoon, prevents from flood, controls famine, conquers plague, and lengthens the average life span. Scientific technology reduced the natural threat in human life, but it has been also producing a great many of artificial disasters, pollutants, chemicals, efficient tools for killing, etc. It can easily cause a great scale of accidental death in a moment. Scientific technology have brought on a new form of risk society in which we constantly living a risky life. Everyone living in such as technological society is inevitably being a risk-taker of death. The purpose of this article is to inquiry how we should treat accidental death caused by scientific technology. How should we treat the development of technology in the risk society? In order to response to these questions, I'll propose the moral principles of technology in a risky life and a study in life-and-death risk as well. The study in life-and-death risk involves the fundamental topics of life-and-death studies, the specialty of accidental death, the concept of death risk, and the risk assessment of death caused by technology.