Upholding the banner of "eliminating corruption and moving the nation upward," Chen Shui-bian of Democratic Progressive Party (DPP) successfully attracted the median voters and the pan-green voters led by Lee Yuan-tseh, while the pan-blue camp was caught in strife, causing the split of its votes. As a result, Chen Shui-bian won the presidential election by only 39.3% of the total vote in 2000, thus ending the 50 years of one-party authoritarian rule by Kuomintang (KMT) and leading to Taiwan's first ruling party alternation. From the perspective of historical dimension, Chen Shui-bian did have a great opportunity to make a significant contribution for Taiwan's democracy and transitional justice. Therefore, this paper uses the theory and context of transitional justice to analyze the period following the first ruling party alternation in Taiwan, focusing on the attitude and practice of transitional justice adopted by the Chen Shui-Bian Administration and the DPP in an attempt to deconstruct what the Chen Administration has done for transitional justice.