本文所要是探討的主題不只是清代防治蝗災時捕蝗的現象，更要要的是探討「捕蝗」的觀念在清代行政上如何成為主導地位。透過檔案、官方文書的分析可知，康、雍、乾三朝治理蝗災的重點，以及災害與行政工作同樣是地方官的壓力來源。由乾隆時期宋乾金捕蝗不力的審問案例中可以發現，捕蝗的行政工作與捕蝗的實質內容是有差異的，行政往往難以滿足真正的捕蝗需求。然而透過康、雍、乾三位皇帝對蝗災的見解，逐步確立「蝗蝻一事，人力可以勝之」的特殊心態，並經由行政體的推廣與執行，使「人力撲捕」成為治理蝗災的唯一方式。

This is a study about policy establishment of exterminating locusts. We not only talk about how people prevent damage from locusts, but about how the concept became dominant. From analyzing official files and documents, we know about what key point is in the policy, and the policy, like disasters, also cause local officials pressure. According to the case of Song Qian Jin (宋乾金), we found there are differences between the policy and the action of exterminating locusts. But one thing in common, the emperors in this period (1662-1795) think “man will triumph over locust disaster”, and they enforced this concept in administration system. So “exterminate locusts by manpower” become the only way to protect the disaster of locust.