20,000 Miles Under the Sea was a science fiction novel written by France's De Nietzsche in 1884. It described De Nietzsche's experience of traveling under the sea in the first person. The work mainly talked about the various people and creatures that De Nietzsche encountered during his underwater travel, as well as his deep thoughts and reflections on human beings and nature. The main character of the novel was Nietzsche, a philosopher and explorer who explored human civilization, the power of nature and the mysteries of the universe through underwater travel. On the seabed, he met all kinds of people and creatures, including the inventor of the Nautilus, Arochelle, and a whale named Beta. Through the communication with these creatures, De Nietzsche deeply realized the insignificance of human beings and the greatness of nature. He thought about the relationship between human beings and nature and how human beings should deal with the environmental and social problems they faced. The theme of the work was science fiction, which involved a variety of scientific concepts and theories such as air pressure, gravity, fluid mechanics, etc. At the same time, it also integrated the thoughts and philosophical views of De Nietzsche. The entire work was full of imagination and philosophical depth. It was a classic work in science fiction and literature.