Environmental policy-making is influenced by the interest distributions affected by it. According to Wilson's classification about regulatory policies, the research analyzes four types of Taiwan's environmental policies. In the situation of concentrated benefits or costs, interest groups have strong incentive to influence policy-making and can succeed. Although in the situation of diffused benefits and costs the environmental bureaus have more freedom, there are still some protests against government during to the simplified process of policy-making. Since the lack of institutions about citizen participation, the diffused public environmental interests always are ignored. The results suggest that the institutions of public policy-making need to be built as we are democratizing.