Until today there are not many historians taking care ofthe taiwanese history in which existed a lot of problems yet. For understanding the recent political development inTaiwan we must know the history of settelment ofHan-nation through Qing-dynasty. In my opinion, theaccumulation of settlement on the I-lan plain is one ofimportent theses to focus. Therefore, the main objective ofthis study is the statistics of settlement aus Zhang-Zhou onthe I-lan plain in 1810. By using the approach of the analysisof literature we disscussed this problem. At the very beginning the doubts of the statistics of thesettlers in I-lan were discussed. Then we analysed ten factsto evidence the unfair of this statistics. Furthmore, weestimated the statistics of the settlers from five aspects.Finly, we obtain a resonable result of Zhang-settlers underhistorical consideration. That ist ca.3,000, not 42,500Zhang-settlers in 1810.