1970년 3월 1일 성의여자중학교가 개교하였으며, 성베네딕도수녀원에서 인수하여, 김순복 수녀가 제4대 교장으로 취임하였다.
On March 1, 1970, Seongui Girls' Middle School was opened, and it was acquired by Saint Benedict's Monastery, and Sister Kim Soon-bok was inaugurated as the 4th principal.