Objectives The purpose of this study is to report the effectiveness of Korean medicine treatment on 69 infant and young child atopic dermatitis patients. Methods 69 infants and young child atopic dermatitis patients who had visited oriental medical clinics from 2011.1.9 to 2012.1.31 were studied. All of them were continually treated for 3 to 9 months, and were analyzed by Objective SCORAD Index (OSI). A detailed analysis of OSI was done according to gender, age, using of topical steroid ointment, family history of atopic disease, treatment period, and intensity. Results 1. Male and female percentage of the study group was 56.5%: 43.5%. The average period of treatment was 6.09 months. 71.0% used topical steroid ointment, and 65.2% had family history of atopic disease. 2. The average period of treatment was significantly longer in patients who used topical steroid ointment, or who had family history of atopic disease. 3. 95.7% of total patients reported decrease in OSI score at the final visit. OSI was significantly lowered after 3, 6, and 9 months of treatment. The longer period of treatment, the lower average post-treatment OSI. 4. 85.5% of the study group had severe dermatitis, and 14.5% was moderate case based on the OSI intensity assessment at initial visit. These percentages got changed at the final visit as 34.8% of severe, 58.0% of moderate, and 7.2% of mild cases. The average treatment period of patients who were diagnosed as severe at the initial visit was 6.18 months, and their final OSI improvement rate was 39.58%. 58% of them were improved to be mild or moderate at the final visit. Conclusion The Korean medicine treatment is effective in treating infant and young child atopic dermatitis patients. There was significant decrease in OSI score after 3, 6, and 9 months of treatment. The difference increase with the treatment period.