Abstract: Among all gynecological malignancies, ovarian cancer has the highest mortality rate. In the diagnosis and staging of ovarian cancer, ¹⁸F-FDG PET/CT is superior to conventional imaging. It is used to assess the prognosis of patients with ovarian cancer and the curative effects of ovarian cancer treatments. In addition, it can be used to guide clinical treatment to improve therapeutic effect. ¹⁸F-FDG PET/MRI is a multimodal imaging technique that has been recently applied in clinical practice. It exhibits unique advantages in the diagnosis of ovarian cancer given its characteristics of multiple-sequence imaging, high soft-tissue resolution, and low radiation dosage. This review presents an overview of the application of ¹⁸F-FDG PET/CT and ¹⁸F-FDG PET/MRI in the diagnosis and staging of ovarian cancer.