There are two topics in the Nālakasutta that are studied in this paper: The first is the biography of the Buddha, a work that describes the life and teachings of the Buddha. In the Nālaksutta, although the birth of the Buddha made Asita happy, he feels sad for unable to hear the Buddha's teachings in his lifetime. He asked his nephew Nālaka to practice under the Buddha’s teachings. The munihood is the second topic, which is the aid to the practice as well as reducing the obstacles. For integrity as well as spiritual completeness, Such practice is necessary. I have found that Nālaka is probable Mahā-kaccāyana. In terms of his relationship with Asita, the time of his death, and his contribution to the teachings of the Buddha, these discussions are based on the Nālakasutta.