"COS" generally refers to costume drama, that is, costume drama, while "science fiction" refers to science fiction. Therefore, "cos science fiction" can be understood as a costume drama activity based on science fiction. Nowadays, "cos science fiction" has become a popular culture at home and abroad. It combines science fiction with role-playing, so that people can feel the infinite possibilities of technology and the future while playing their favorite roles.

For the vast number of "cos science fiction" fans, clothing, makeup and props are all indispensable elements. They will study the design of the role, carefully select materials, and hand-make exquisite costumes and props to match the role. At the event site, people can enjoy all kinds of wonderful performances and cool costumes. In the world of "cos science fiction", people can enter another self.

In addition to pure entertainment, science fiction works are often the imagination of human advanced technology and the future world. Under the background of "cos science fiction", people can explore new scientific and technological themes in their creation and constantly challenge the limits of science and technology. Scientific and technological innovation, social progress, and our future life are all more concrete. Therefore, "cos science fiction" is not only an entertainment activity, but also one of the ways for people to learn and explore.