In this treatise significant aspects of Korean and Australian popular novels are examined through a comparative study of Korean and Australian detective stories and science fiction. In the comparative study of detective stories, it is shown that Korean works focus on male detective`s adventures, succeeding to Kim rae-sung`s creative mode, while Australian works concentrate on the situations of criminals and the destinies of women, imitating Mary Fortune`s unhappy self-history. The treatise proposes that the differences between Korean and Australian detective stories are due to the developmental processes the genre has been through in the two nations. In the comparative study of science fiction, it is suggested that S.F. has suffered because of the widely held opinion in Korea that it is an inferior form of narrative, fit only for publication as computer literature However Australian S.F. follows the traditions of European science fiction, comprising diverse aspects (space-opera, didactic story and experimental human drama etc.) The treatise asserts that these differences in science fiction are due to the different cultural bases of the genre in two nations. From this standpoint it is concluded that popular novels of the two countries, though they owe their existence to the same reader- interest and reader-anticipation, have developed differently as the result of the cultural influences brought to bear on them.