The novel," Disqualification of the World," was written by Japanese author Osamu Dazai. It described the thoughts and explorations of the protagonist Osamu Dazai when he faced problems such as emotions, human nature, and self-cognition. The following is my understanding and opinion of this novel: This novel presents the complexity of human nature and the impermanence of life through Osamu Dazai's inner world and his reflection on society, family, love, and other aspects. Osamu Dazai expressed the loneliness and helplessness of life by describing the gradual collapse of his understanding of society and human nature and the exploration of his inner world. At the same time, the novel also revealed the contradictions and conflicts between society, families and individuals through the interaction between Osamu Dazai and many characters, presenting some common problems in Japanese society. This novel is a novel full of depth and content. It not only shows the dark side of human nature, but also express the reflection and exploration of life, love and society. Through Osamu Dazai's inner world and character image novels, some unique thoughts and values in Japanese culture, such as the distortion of human nature and social injustice, were also presented. Therefore, this novel was not only a literary work, but also a philosopher who explored human nature and society.