休谟的非理性道德论隐含着四层含义,而他本人对这四层含义的区分并没有明确认识。本文分析其中两层含义:特定行为的善恶来自行为者的情感、动机,人为的德的一般性区分是通过感觉印象确立的。行为者和评判者赋予特定行为以价值性意义。正义法则承载着事实性意义和价值性意义。 Hume’s irrational moral theory implies four meanings, but he does not have a clear understanding of the four meanings. This article analyzes two layers of meaning: the good and evil of specific behaviors come from the emotion, motivation and general distinction of human behavior through the sensory impressions. Actors and judges give value to particular behaviors. The law of justice carries the factual significance and the value meaning.