Intervention levels for foodstuff restriction in a radiological emergency in Korea are suggested based on the justification and the optimization through the cost-benefit approach method from IAEA Safty Series 109 recommendation. Intervention levels are specified for three broad groups of radionuclides with similar values of committed effective dose per unit intake and specified for two broad categories of foodstuff grouped according to value per kg. It is also discussed on the applicability of revised intervention levels for foodstuff restriction.