Twenty Thousand Miles Under the Sea was a science fiction novel by Verne. The novel mainly told the story of an expedition team composed of scientist Nimo de Ruyak and his assistant Aaron Dufresne, who went to the deep sea to explore mysterious substances in a submarine invented by Nimo de Ruyak. At the bottom of the sea, they encountered all kinds of difficulties and dangers, interacted with deep-sea creatures, and discovered the insignificance of human existence and the magnificence of the ocean world. The whole novel was divided into four parts: Finding the Pearl, Landing on the Moon, Mysterious Island, and The Last Question. The plot was full of science fiction and imagination. The deep-sea creatures, underwater relics, mysterious substances, and other elements in the novel were full of exploration and adventure.