This treatise places emphasis on studying the reality and the process of the occurrence of the story of terrace of vomiting blood which had been circulated among Joseon intellectuals. The story of terrace of vomiting blood took Ningyuan Battle, a war between Ming and Later Jin as its background. The story says that Nurhachi of Later Jin who led a large army and attacked the city of Ningyuan suffered a crushing defeat by the strategy and the dauntlessness of Yuan Chonghuan of Ming, vomited blood with resentment, and finally died. The story also tells that Han Won, a interpreter who came to China as a member of Joseon envoy appeared as a witness of the war. The story of terrace of vomiting blood was widely known among Joseon intellectuals since the story was described for the first time in Chunpadang ilwol rok written by Lee Seongryeong. Especially, Joseon envoys identified sometimes the place where the story was happened when they passed Ningyuan located on the way of their journey. There is a terrace of signal fire which was established on Shoushan northeast of the city of Ningyuan in the Zhengtong reign period. Later on, the story of terrace of vomiting blood has developed into verious forms. For example, the protagonist in the story has been changed from Nurhachi to Hong Taiji. The purpose of Joseon intellectuals' mention of the story of terrace of vomiting blood was to show their repulsion against Qing government causing humiliating history and to get a kind of vicarious satisfaction through the victory of Yuan Chonghuan of Ming. Reality and fiction coexist in the story of terrace of vomiting blood. The story's description about the war is near to historical reality but its mention about Joseon envoy and interpreter is fiction. It is true that Joseon envoy could not enter into Ningyuan and Jinzhou in 1626 of Ningyuan battle or in 1627 of Ningjin battle which are mentioned in the original story or in the modified story. Lee Heul and his company visited again in 1629 and an interpreter Han Won, a member of envoy met Yuan Chonghuan several times. Han Won went to Jinzhou and looked around military training and facility with Yuan Chonghuan. It is assumed that the situation that Han Won witnessed was known to Joseon intellectuals and later on the story was created by later generation's exaggeration.