With the growing awareness of human rights, many countries begin to review and revise their statutes. In this context, it is a universal value to protect "person's rights". On the contrary, it seems to be difficult and controversial to decide the approach of the fetus protection. As a result of this difference, some countries choose to set a series of clauses of offenses of abortion in their criminal code nowadays, and others still refuse to make the same or similar provisions. The former, such as Japan and Taiwan, focus on the protection of the fetus. The later, such as Mainland China and India, focus on the population pressure and related social policy. Dealing with this vital issue, the author discusses and identifies the legitimacy of abortion and the legal interest in criminal law at first. Then, the author tries to analyze the abortion laws in Taiwan and Mainland China, such as the Criminal Code of the Republic of China, Genetic Health Act, Criminal Code of People's Republic of China, and Population and Family Planning Law. Based on this comparative research, the article tries to give a primary conclusion and suggestions in the end.