如何釐清倫理困境進而作出倫理決策，一直是倫理學「教」與「學」相當棘手的部分。本文在檢討幾個具代表性的倫理決策模式之後，嘗試提出一個簡易但不失其完整性的模式：「四步驟三追問」，最後以「某企業的網路監控案」為例，介紹如何利用它進行倫理決策的教學。本文所謂的「四步驟」，包括：1.問題的提出：個案的消化、摘要甚至改寫，然後找到切入的關係人及困境問題。2.可能的選項：找出該困境問題可能的解決方案。3.評估與檢討：比較各種可能解決方案之優劣。4，決策與反思：作出決策，並反思如此決策的理由。上述第4步驟，也就是最後的「決策與反思」，常常是五五波，並不易作出。因此，本文乃以基本倫理學三個主要理論：「效益論」、「義務論」以及「德行論」為主要依據，並參酌本文所檢討的幾個倫理決策模式的優劣後，提出更具體且生活化的「三追問」，以輔助倫理決策的完成。

The ways through which ethical dilemmas may be clarified and ethical decisions may be made have been quite a tricky topic in ethics ＂teaching＂ and ＂learning.＂ This paper attempts to review a few representative ethical decision making structures and propose a simple model of ＂Four Steps, Three Questions＂ without a loss of its integrity. Finally, ＂enterprise network monitoring＂ is presented as an example, and the methods of its use for the instruction of ethical decision making are discussed. In this paper, the so-called ＂Four Steps＂ consist of the following: first, ＂Raised Questions＂ involve a case digest, summary or rewrite, and then the posing of the questions of ethical dilemmas. Second, ＂Possible Options＂ involve a search for the possible solutions to ethical dilemmas. Third, ＂Assessment and Review＂ compare the advantages and disadvantages of possible solutions. Fourth, ＂Decision Making and Reflection＂ consist of decision making and a reflection on the reasons for such decisions. The fourth step, which is the final ＂Decision Making and Reflection,＂ is often difficult to make. Therefore, this paper proposes the following three theories of ethics as the main basis of an approach: ＂Utilitarianism,＂ ＂Obligation Ethics,＂ ＂Virtue Ethics.＂ After a few deliberate reviews of the proposed ethical decision making structure, this paper presents ＂Three Questions,＂ a more concrete method of assisting ethical decision making.