Abstract: On the list of the Booker Prize winners, there are only two writers who have won the Booker Prize twice, and they are Peter Carey and J.M. Coetzee. Both of them hold Australian citizenship. When these two writers are put into the field of Australian Literature, many factors could be found which might help literary researchers study their works from the perspective of world literature and comparative literature. The author of this essay applies the concept of the Third Culture to probe into their diasporic writing perspective.