The purpose of this article is to explore ethnic mainstreaming from the perspective of policy observation. The author claims that the core of ethnic mainstreaming is to truly create a multicultural Taiwan, rather than a hegemonic Taiwan dominated by a single ethnic group. The concept of ethnic mainstreaming is based on the idea of gender mainstreaming. The author analyzes the necessity of mainstreaming ethnic groups from six perspectives: fragmented national policy planning, distorted ethnic identity under improper government policy, deprived language and citizenship, the constrained role of the Council of Indigenous Peoples, iniquity of hunting, collective rights of Taiwan Indigenous peoples. The author concludes that when all the Taiwanese know how to coexist with the land in a way that is closer to the land, the society may benefit from the peaceful cohabitation of all ethnic groups in this land.