Ocular myasthenia gravis (OMG) is an autoimmune disease involving the postsynaptic membrane of the neuromuscular junction. The fluctuation of OMG and the clinical characteristics of fatigue easily lead to a high rate of missed diagnosis and misdiagnosis, which seriously affects the quality of life of patients. Therefore, detection methods play an important role in the early diagnosis of OMG. In this paper, OMG detection methods were reviewed in clinical examination, neostigmine test, autoantibody detection, electrophysiological detection, and other aspects, in order to provide useful guidance for the early diagnosis of OMG.