Clinical analysis of 29 cases of Graves' ophthalmopathy and 71 cases of ophthalmic Graves' disease showed that both identities had common ocular features of lid retraction, upper lid lag and exophthalmos, while Graves' ophthalmopathy tended to occur in later life, with longer morbid course, marked systemic symptoms and binocular involvement in contrast to ophthalmic Graves' disease. The clinical and differential diagnoses and treatment of the maladies were discussed.