In modern democratic country, the complexity of public affairs is a difficult topic of public policy. Only admires the objective analysis technology is insufficient to in accordance to the complex public decision-making. Therefore, the public policy formulation needs the suitable political judgment. But populace's policy-making cognition mode then is the key to carry out the policy formulation. Today Taiwan society had the certain democratized degree and the economic basis, the populace had opportunity to participate in public affairs. As a result of is extremely insufficient in the participation public affairs training, the populace has not been able by rational when discuss the public subject that he faces. Here cognition is uncoordinated and possible to initiate the policy-making conflict. If we want to reduce the policy-making conflict to achieve higher policy-making quality, it is the necessary thorough understanding common populace's policy-making cognition mode. This research is based on the Cognitive Continuum Theory, take sets up a wetland park as the example, designs a quasi-experiment to directly compares efficacies of analytical, intuitive and quasi-rational cognition mode of the populace in the public decision-making. The research target lies in to regards the analytical cognition and the intuitive cognition is dichotomous proposes the counter-evidence, proved they are the beginnings and ends of the cognitive continuum. The findings showed that, (1) the characteristic policy-making judgment cognition mode of the populace to the wetland park judgment is a continuous distribution state. (2) The cognition identity of judgment method to be able to induce the cognition identity of the policy-making judgment. (3) The populace's policy-making judgment behavior has the analysis cognition identity that they can depend on analytical judgment method to carry on the policy-making judgment. (4) The policy-making cognition mode can come under cognition of identity influence the policy-making judgment method. The better correlation of judgment method and the goal cognition identity, the more consistent policy-making performance.