Objective The characteristics of ultrasound and MRI of ovarian goiter were analyzed and summarized in order to improve the diagnostic accuracy of the disease. Methods The ultrasound and MRI data of 7 cases of ovarian carcinoma confirmed by pathology after operation in our hospital were analyzed retrospectively. The imaging diagnostic features were summarized retrospectively and the relevant literature was reviewed. Results All lesions were unilateral in 7 cases, 3 cases were multilocular cystic, 4 cases of cystic solid, ultrasound and MRI showed the boundary between the mass and the surrounding tissue. Ultrasound showed a medium or slightly hyperechoic echo separated by a uniform or uneven thickness. The solid protrusions of the inner wall are medium or hyperechoic. Internal visible blood flow signal, strong echo calcification in 2 cases. Complex signal intensity of Cystic components in MRI, the cystic fluid on T1WI and T2WI showed low signal intensity, iso-signal intensity or high signal intensity. The solid part of T1WI is isointense and T2WI is isointense or slightly hyperintense. During enhanced scanning, liquid components were not enhanced, cystic wall, septum and solid protuberance were significantly enhanced, the density of the enhanced solid components is similar to that of thyroid tissue. Conclusion Ultrasonographic and MRI findings of ovarian goiter have some characteristics,It can provide valuable information for the diagnosis of the disease.