In the literatures of Ch'ing period 【清代】 about Taiwan, the most interesting ones are the writings about aborigines' cultures. The process of cultural differentiation in ‘Self’ and ‘Other’ can be found in these literatures. This paper will look at the theory and process of ‘othering’ at first, and then make investigations into how Han's 【漢人】 imaginative geographies ascribe meaning to the representation of Taiwan's aborigines in Chu-lo County Gazetteer. 【諸羅縣志】 At last, this paper will identify two tropes that became very influential in the writing of Taiwan's aborigines.