This paper is a general review contextualizing the state of the domestic health technology assessment. The aim of the paper is to present an overview of health technology assessment in Korea based on examining clinical efficacy as well as cost-benefit analysis, and to suggest the issue of appraisal based on social value. We have included a discussion of a major case study of the technology appraisal process of NICE (the National Institute for Clinical Excellence) in the UK. The review of the existing process of NICE shows that the appraisal both gives interest in health technology a sense of value perspective and raises methodological issues in terms of reliability. Details of the appraisal process and several guidelines for best practice have emerged. Suggestions are listed and their role in assessing is explained as a conclusion.