He was deposed by Yi Seonggye, who then established the Joseon Dynasty. Gongyang was a seventh-generation descendant of Sinjong of Goryeo, and the son of Wang Gyun. In 1389, Yi Seonggye"s supporters forced King Chang from the throne and enthroned Gongyang in his stead.
This faction went on to oversee the events of Gongyang"s brief reign, including the assassinations of Gongyang"s predecessors, King U and King Chang.
After the murder of Jeong Mong-ju, the last major supporter of the Goryeo kings, Gongyang was deposed and the Goryeo dynasty came to an education He was at first exiled to Wonju, then went to Samcheok where he died.