Throughout the Chinese history, the Mid-Tang dynasty (AD 762-840) was a remarkable period that floods and droughts frequently appeared. In this period Emperor Dezong (r. 780-804) had nothing to do but continuly employed the past policies of disaster reliefs, such as zhenxu 賑恤, juanmian 蠲免, jiantiao 賤糶, and jinbidi 禁閉糴. Therefore, more corrupt practices of the relief policies emerged. Take the first two policies for example. First, the implement of zhenxu caused the increasing contradictions between the government and the regions. Emperor Dezong, therefore, refused to dispatch missionary officials to the disaster regions for catastrophe rescues. The disaster reports or memorials were occasionally kept secret from the emperor because local officer selfishly desired to be promoted. Second, the relief policy of juanmian can not succeed due to the local regions only had limited financial budgets. As a result, the central government was merely willing to excempt the buqian 逋欠 from very little regions, and the disaster problems were getting worse. Setting aside the alternative crisis between the natural catastrophes and the governmetal malpractices for the historical moment, this article subsequently the focus on the well-known poet, Bai Juyi (772-846), investigating how come the New Collections of Song and Poems Revolution was formed during this during this period, and why was it composed by Bai Juyi. After analyzing the works of Bai Juyi, this article pointed out that Bai presented his benevolent thoughts of jimin 濟民 by three approaches -- composing poems denouncing the government's reap without sowing, reestablishing the water conservations, and praying gods and spirits for the disasters free.