立法院於第三屆開始推動一連串國會改革，其中重大變革之一為賦予黨團協商正式化地位，期望我國國會運作藉此獲得改善，並大幅提升議事效率；但新制上路後反而衍生諸多制度性困境。因而立法院於第四屆結束前，又通過第二波大規模國會改革相關法案，其目的乃為匡正第一波國會改革將黨團協商制度化後所產生之種種弊病，以求協商制度更為完備。 隨著黨團協商在立法過程的重要性的升高，本文首先從我國國會決策模式的理論觀點，來分析黨團協商在立法決策過程中所扮演的角色有失衡的傾向。為瞭解黨團協商在國會中的形成與演變，本文針對第一次國會改革（法制化黨團協商）以及第二波國會改革（修正黨團協商）的主要內涵說明，並對於黨團協商在立法程序與法案內容的影響力進行分析。筆者假設第二次國會改革後，黨團協商的主導立法程序與實質內容的現象，已經獲得改善；而在實證上，本文根據立委訪談與公報資料分析加以佐證與解釋。初步觀察可知，在第二波國會改革之後，黨團協商制度日趨成熟，並慢慢修正過去凌駕專業之缺失，而與委員會之功能逐漸形成決策角色之區別分工。

Beginning from the third-term Legislative Yuan, a series of congressional reforms have been put into place: institutionalizing the inter-party negotiation has been one of the most important steps among all. It hopes to improve the legislative function and efficiency. However, several institutional drawbacks have been found after the first reform, which leads to the second-round cogressional reform to correct the problems made by the previous reform and to prefect the institution. As the inter-party negotiation becomes increasingly important, this papaer will firstly address imbalance of inter-party negotiations in the policy-making process, from the perspective of legislative decision-making theory. To better understand the origin and transformation of system of inter-party negotiation, we shall explain the impact of the first-round and second-round congressional reforms on the system; in return, analyze the impact of the system on legislative procedure and substance. We hypothesize that after the second-round reform, the dominance of the inter-party negotiation system in the legislative procedure and substance has been improved. Our evidence from interviews and official documents shall prove it. From our primary observations, after the second congressional reform, inter-party negotiation system has been gradually matured, corrected the problem of overriding the committee's professional decision-making, and come to strike the balance of the labor division with the committee.