Utopian science fiction, as a fusion of science fiction literature and utopian literature, integrates the construction of imagined interactions between people, technology, society, and the environment in future narratives. In doing so, it deepens the aesthetic value and social significance of science fiction literature. Chinese science fiction utopian future narratives use technological imagination to construct three models of expression. First, they re-examine the symbiotic patterns of technology, humanity, and time within the multiple dimensions of human subjectivity. Second, within the transformation of social structures, they reassess the subject and emotions, recognizing that the acceleration of social change has transformed human nostalgia into a series of rehearsals seeking future possibilities in the past. Third, within the dissolution of cultural politics, they reconsider space and the environment, reconstructing planetary existence through a model of deterritorialization. The imagined technological developments constitute the internal logic of Chinese science fiction utopian future narratives, suggesting that the future is an uncertain movement entangled with technology, time, space, and human nature. The confluence of technology, time, and humanity gives rise to people’s expectations and yearnings for eternal life. However, these three modes of narrating the future also lead us to return to Earth as the central theme, highlighting the planetary nature and reflecting on the meaning of existence.