它研究人们应该遵守什么样式的道德行为准则）、应用伦理学（将伦理理论应用于实际生活状况的学术，包括生物伦理学、政治伦理学等）、描述伦理学（搜集关于人们怎样生活的信息，从观察到的样式来作总结。
It studies what kind of moral code of conduct people should abide by), applied ethics (the research where ethical theory is applied to actual living conditions, including bioethics, political ethics), descriptive ethics (collect information about how people live, and summarize from the observed patterns.