The Galaxy Empire series was a hard sci-fi. Hard science fiction referred to science fiction based on scientific principles and proven technology. The scientific settings and worldviews in the works were usually rigorous and verified by science, and often had a certain degree of real-world reflection. In the Galaxy Empire series, the author George R. R. Martin's worldview and technological settings included some scientific elements such as planetary gravity, time travel, interstellar trade, and so on. These settings were fully displayed in the novel. In contrast, soft sci-fi focused more on imagination and philosophical thinking. The technological settings and worldviews in the works were more like symbols or symbols that lacked a certain amount of evidence and scientific verification. Although the Galaxy Empire series also contained some philosophical and thoughtful content, it was more presented as a literary means, so it could be seen as a kind of hard science fiction.