Crusoe's mood in "Crusoe" experienced many changes. At the beginning of the story, he felt excited and curious because he found himself in a completely unfamiliar environment and faced many unknown challenges. However, as he was trapped on the deserted island for a longer time, he gradually felt lonely and desperate. He experienced many difficult moments such as hunger, thirst, loneliness, and fear. He also faced various challenges from nature such as storms, waves, and wild animals. These challenges intensified his psychological pain and despair, making him feel that he was one with the world around him and could not escape the fate of this deserted island. In the end, Crusoe found a solution to the problem through persistent efforts and thinking. He gradually adapted to life on this deserted island by planting plants, making food, and building a residence. He found his meaning of existence. His experience also made him realize the importance of human wisdom and creativity, as well as the importance of living in harmony with nature. Therefore, when he was finally saved and returned to civilized society, he felt proud and fortunate, and at the same time, he felt a re-examination and reflection on life.