Diagnosis of uveitis based on etiologies and entities is essential for the treatment of the uveitis patients. A careful and meticulous inquiry about history may provide important clue to the diagnosis. Careful and detailed clinical ocular examinations allow us to make a correct diagnosis in most uveitis patients. Auxiliary examinations and laboratory examinations chosen principally based on clinical manifestation enable us to make a definite diagnosis in almost all the uveitis patients.