建构应用伦理学体系必须弄清两个根本问题 :“应用什么”和“应用于什么”。前者可归纳为德性论、义务论、价值论三种道德理念 ;后者可归纳为人生伦理、社群伦理、自然伦理、信仰伦理四个生活层面。这两个根本问题也构成应用伦理学的方法、对象和切入点 ,并且规定着应用伦理学不同于广义伦理学和基础伦理学的特征。 To construct the system of applied ethics, we must understand two fundamental questions: what should be applied and what should be applied to. The former can be summarized as ethics, obligations and values ​​of the three ethical ideas; the latter can be summarized as life ethics, community ethics, natural ethics, ethics of belief four life levels. These two fundamental issues also constitute the methods, objects and starting points of applied ethics, and define the characteristics that apply ethics differ from generalized ethics and basic ethics.