his grandmother Grand Queen Dowager Jaseong, ruled the nation along with his biological mother Queen Insu, and his aunt (and adoptive mother) Queen Dowager Inhye. In 1476, at the age of 19, he began to govern the country in his own name.

After the death of his first wife in 1474, Seongjong decided to promote one of his concubines, Lady Yun, to the status of primary wife and queen.