The process of public policymaking in Legislative Yuan has commonly been depicted in a prescribed logical routine. At first, policy problem captures the attention of legislators. Next, legislators assess that problem and its causes and to respond as efficiently as possible through new legislative enactments. Seeking to address this natural logical sequence, this article systematically examines the member's incentives, group dynamics, and potential combinations of alternatives in new Legislative Yuan, and predict that legislators tend to not go through a logical routine: defining the problem, generating the possible solutions, evaluating the alternatives Rather, legislators work on policy problems only when a specific combination of problem and solution in a choice situation makks it possible.