The themc of the paper is to address, from ethics perspective, the required attributes and characteristics of policy discourse for promoting good and democratic policy-making process. The two core of purposes of this paper are: 1.to provide some guidelines of discoursive behavior involved in policy proccss; 2.to construct an ided-type framework of reference in order for criticizing unreasonable foundations of policy discourse. The paper furthly analyzes two kinds of discoursive ethics of public policy: behavioral ethics and subjectivity ethics. The requirements for achieving behavioral ethics are that: 1. the motivation of discourse is oriented to mutual understanding; 2.the style of discourse is based on common and complete back ground and reasoned from the nature of policy problem; 3. the communicative channels of discourse are multiple. accessible and open. The subjects of discourse should have public spirit and citizenship and dialogue claims of validity for gaining ethics. The claimcrs are willing to build an interactive network for effcctive communication and able to lct their, claims approach ,the status of fact. At the same time, the subjects of discourse should also confront environment with analytic and critical attitudes in order to avoid environmemal domination. Finally, in order to show ,the realism of ethical policy discourse, the paper also identifies the way to pragmatically use it. Conference of National Development is selected as an example to be dialogued with theoretic analysis discussed in this paper. By doing so, it is proved for the pragmatic power of ethics of policy discourse.