本文旨在透過新史料以重建草屯地區之歷史，在論證過程尤其強調古文書所呈現之歷史史料之豐富與對歷史研究之貢獻。本文以乾隆23 年古文書排除草鞋墩地名起源諸說中之「林爽文說」、「墾民說」、「挑夫說」。又以古文書與族譜資料互證，確定草屯北投社之有「舊社」，「舊社」在今北投埔。此為草屯歷史、北投社史之一大發現。「內木柵」過去都被等同土城，古文書證其錯誤，正確的內木柵是匏仔寮台地以東到屯園間之廣大地區，而土城、屯園反不在內。「北投街」在古文書上出現於乾隆47 年。比過去的認知要早。「南北投保」成立的時間在乾隆28、9 年，這之前屬貓羅保，再前屬半線保。南北投保分立時間最遲在同治初年，也許早到道光中期。過去以為是光緒元年是錯的。

This article is meant to rebuild the history of Tsaotun area through the lately discovered historical materials, and through its expounding process, this article specifically highlights the richness of those historical materials extracted from those ancient documents, and the contributions of those ancient documents for history studies. Manifesting by the ancient documents chronicled in ChyuanLong 23rd year (1757 A.D.) in Ching Dynasty, this article exempts some conjectures concerning the origination of the name of TsaoHseihDuen, and excludes three hypothetic assumptions-- LinShuangWen Hypothesis, Frontiersman Hypothesis and Bearer Hypothesis. In addition, by mutual comparison of those ancient documents, this research ascertains that “JioSheh” has existed in PeiTou-Sheh in Tsaotun, and the location of “JioSheh” is in current PeiTouPu. This is a significant discovery of the history of PeiTou-Sheh and the history of Tsaotun. Furthermore, historians considered that “NeyMuaCha” is equivalent to Tu Cheng before. However, those ancient documents prove this cognition is wrong. The correct site of NeyMuaCha should be the broad region from the east of PaoZiLiau Terrace to TunYuan, yet this region does not include TuCheng and TunYuan. The name of "PeiTou-Jie" first revealed in the ancient documents was chronicled in ChyuanLong 47th year (1781 A.D.) in Ching Dynasty. This evidence indicates that this local administrative division, PeiTou-Jie, was instituted in a much earlier period than the past cognition. As to "NanPeiTou-Bao," it was established in ChyuanLong 28-29th year (1762-63 A.D.) Before the local administrative division, NanPeiTou-Bao, established, "MaoLuo-Bao" governed this area. And before that, "BanHsian-Bao" governed this area. "NanPeiTou-Bao" separating into two administrative divisions happened, the latest, in the early TongJyh Era in Ching Dynasty, while this measure could happen even earlier in mid-DawGuang Era in Ching Dynasty. The prior cognition that it happened in GuangHsiuh first year (1875 A.D.) is wrong.