主要分为元伦理学（抽象地研究伦理理论或批判的本质）、规范伦理学（评判各种不同的道德观，并且对于正确或错误行为给出道德准则建议。
It is mainly divided into meta-ethics (study of the essence of ethical theory or criticism in an abstract way), normative ethics (judge different moral concepts, and to give moral code suggestions for correct or wrong behavior).