李登輝前總統曾經帶領臺灣從威權時代走向民主，確實有其不可抹煞的貢獻，然而，長達十二年多的執政也不免留下若干爭議，今日臺灣所實施的憲政體制即為一例，尤其是中央政府行政與立法兩權的制度設計對於國家與人民的影響至為重大。李登輝之所以推動修憲，自是有各種原因，推動國會全面改選既是為了解決舊時代體制的問題，也是回應來自民主運動的要求，其後更因應社會輿論而推動總統直選，而伴隨著政治局勢的演變也使得其他新制度因修憲而產生。本文嘗試透過對政府各機關檔案、當事人回憶錄、新聞媒體報導及其他各類史料的交叉分析，試圖將我國這段對國家影響甚鉅的歷史完整記錄下來。

Former President Lee Teng-hui has led Taiwan from authoritarianism to democracy, and it does have an indelible contribution. However, the administration of more than twelve years has inevitably left a number of controversies. The constitutional system implemented in Taiwan today is an example, especially the design of the central government's administrative and legislative powers has a significant impact on the country and the people. There are various reasons why Lee Teng-hui has promoted constitutional amendments. Promoting a full re-election of the Congress is not only a solution to the problems of the old-time system, but also a response to the demands of the democratic movement. Later, he also promoted the direct election of the president in response to public opinion. The evolution of the situation has also led to other new institutions resulting from constitutional amendments. This article will try to fully record this part of the country's history that has had a great impact on the country by analyzing the archives of government agencies, memoirs of the parties, news media reports, and other historical materials.