This project is a multi-center, prospective, randomized controlled clinical observation the safety and efficacy of hyperthermic intraperitoneal chemotherapy as neoadjuvant chemotherapy(NACT) and postoperative chemotherapy after interval debulking surgery (IDS) for advanced-stage epithelial ovarian cancer . PR/SD rate, percentage of optimal debulking surgery and 3-year disease-free survival is the primary end points of this project.