董啟章是當代香港文學最重要的作家之一，其成名作《安卓珍尼》奪得了聯合文學小說新人獎中篇小說首獎之後，他陸續推出的三部長篇鉅作「自然史三部曲」——《天工開物•栩栩如真》、《時間繁史•啞瓷之光》以及《物種源始•貝貝重生之學習年代》。董啟章在上述三部長篇中與各家理論及小說家進行對話，皆思考和討論人文與科學的共生關係，且在對話和討論的過程中，小說的人物角色有成長的痕跡。因此本論文以董啟章的「自然史三部曲」為主要研究對象，分析董啟章與各家理論的對話，及其對人文與科學的思考，並探討人物角色在對話和思考過程中的成長經歷。本論文以敘事學為研究方法，從時空敘事、人物敘事以及符號系統三方面著手，探討董啟章小說的敘事結構；再參考巴赫金的複調小說理論，以論證董啟章小說的時空敘事結構、人物敘事結構以及符號系統的對話關係，分析自「意識（自我）／潛意識（他人）」的對話中分裂而衍生的多聲調結構、「眾聲喧嘩」景象和小說敘事風格。;Dong Kai-Cheung, a well-known Chinese fiction writer born and living in Hong Kong who plays a significant role not merely in contributing influences but he has continued to bring paradigm shift to the Chinese literature in the society. He is especially has a sense in cultural critiques associate to his homeland. His many writings inspired by the city life have become so popular. This study draws upon primary sources of Dong’s work including novels and proses. The research focused on a complete collection of Dong’s trilogy novels, which are Tian Gong Kai Wu • Xu Xu Ru Zhen, Shi Jian Fan Shi • Ya Chi Zhi Guang and Wu Zhong Yuan Shi • Beibei’s Learning Era. This focus is to shows the connections of Dong’s narrative writing to dialogism relation between humanity and science in the society. The study methodologies are framed by Narratology further with Mikhail Bakhtin’s dialogism, polyphonic novel theory and heteroglossia theory. The dissertation is divided to five chapters. First chapter elaborated on the objective of the study, its previous studies and the research methodologies. The subsequent three chapters are the core contents, which included chronotope narrative, characters narrative and semiotics narrative. The final chapter is conclusion of the study.