Provided are a composition, a kit, and a method of predicting prognosis of ovarian cancer or a risk of recurrence of ovarian cancer. Provided are a composition for treating ovarian cancer or preventing recurrence of ovarian cancer and a method of screening a material for treating ovarian cancer or preventing recurrence of ovarian cancer. According to the present disclosure, prognosis or recurrence of ovarian cancer can be efficiently diagnosed, and a candidate material that can treat ovarian cancer or prevent recurrence of ovarian cancer can be efficiently screened.