What is ancient Greek ethics' In his recently published book, Shenming Yu Luogesi, Prof. Bao sets out to give an account of the history of ancient Greek ethical thought This paper, based on some of Prof Bao's assertions in the book, attempts to critically explore some of the characteristics in ancient Greek ethics. The three main characteristics, in my point of view, in the ancient Greek ethics are virtue, happiness, and life as a whole. I shall in this paper focus my discussion on these notions in different philosophers and poets. This paper has put its emphasis on the following topics: firstly, is there a systematic structure in ancient Greek ethical thought? It is easy to see that structure featuring in the modern moral theories, whereas it might not be the case for the Greek ethics. Secondly, why is Homer particularly interested in the heroism? What kind of moral problems will arise from his heroes? Does Homer himself offer any answer to them? Thirdly, in the age of politics of polis what would be the relation between the citizens and the state? How does Plato, as an ingenious political and moral philosopher, deal with this problem? And why does Plato think that living in a society will bring benefits to men? Fourthly, What is the relation between virtue and happiness in Aristotle's thought? Why does Aristotle insist the fact that the mean has to be decided by the man of practical wisdom?