Cai E has gained a reputation as Defend Army Soul and a strong supporter of democracy. In 1913, Yuan had Cai removed from his office and eventually held under house arrest in Beijing. As the story goes, Cai had a relationship with Xiao Feng-xian and he could escape the detention is also with the great help of Xiao. After returning to Yunnan, Cai established the local National Protection Army to resist Yuan and defend the Republic. The purpose of this article is trying to find out the differences between the truth and the romance by comparing and analyzing some important episodes in their love story with the historical mate