Fantasy is a psychological phenomenon of human beings. It refers to the creation of virtual worlds, characters, or plots in one's imagination. People liked to fantasize because they were curious about the unknown and wanted to explore the mysteries of the world, or because they felt unsatisfied in real life and sought some comfort and satisfaction through fantasies. Fantasy could also be a way to relax and relieve stress. When we feel nervous or anxious, fantasizing about beautiful scenes can help us relieve negative emotions and make us feel more relaxed and comfortable. However, excessive fantasies may also cause us to lose our sense of reality and affect our lives and work. Therefore, we need to reasonably control our fantasy behavior and maintain a sense of reality and responsibility in order to better adapt to real life.