Objective : This study was designed to evaluate oriental medicine therapy on a hyperthyroidism(T3 toxicosis) patient Methods : The clinical data was analyzed on a patient with hyperthiroidism(T3 toxicosis). This patient was treated with oriental medicine therapy only. After treatment, we analyzed a paient clinical symptom and thyroid function(T3, free T4, TSH) Results : After treatment, improvement was seen in clinical symptom, thyroid function test. conclusion : The study suggests that oriental medicine therapy is effective on the treatment of hyperthyroidism(T3 toxicosis).