Nichomachen Ethics and Concerning the Principles of Morals are two empirical readings on Ethics,but compared with Humean Philosophy,Aristotelian philosophy was filled with metaphysical characteristics.Therefore,their discussions on ethics have both similarities and differences so that their ideas on many concrete issues can be compared.Based on the similarities and differences on fundamental methods from this two books,this paper tries to make a comparative analysis on ideas of two issues by Hume and Aristo...