Currently, Ministry of Environment has promu lgated and executed 'the legislation of indoor air quality for public facilities' but the data of indoor air pollutant for public facilities of this law was very insufficient. Therefore, collection of data for indoor air pollutants and execution for risk ass essment in order to offer scientific data for decision-making of policy to present reasonable standards and preventive techniques of engineering were required. Therefore, this study collected and re-analysed the articles of exposure assessment for indoor environment in journals related enviro- nment in Korea since 1990 and estimated the safety factor on residents in public facilities. The objective of this study was to offer scientific data for decision-making of policy for improvement and management of indoor air quality in Korea. As the results of this study. the risk assessment for the critical pollutants in CTE(central tendency exposure) showed that safety factors according to pollutants were less than 1 which means safe level in micro-environments. It was investigated that the safety factors of CO in hospital, NO2 in terminal, PM10 and NO2 in subway station respectively were over than 1 in RME(reasonable maximum expo- sure). Through the results, it was investigated that health risk by inhalation of criteria and guideline air pollutants in domestic public facilities was not high. It should be considered effect of inhalation by other hazardous air pollutants because this study was examined just partial pollutants. Pres- entation of scientific data for expansion of study is requisite and active research of health risk assessment about indoor air quality. exposure) showed that safety factors according to pollutants were less than 1 which means safe level in micro-environments. It was investigated that the safety factors of CO in hospital, NO2 in terminal, PM10 and NO2 in subway station respectively were over than 1 in RME(reasonable maximum expo- sure). Through the results, it was investigated that health risk by inhalation of criteria and guideline air pollutants in domestic public facilities was not high. It should be considered effect of inhalation by other hazardous air pollutants because this study was examined just partial pollutants. Pres- entation of scientific data for expansion of study is requisite and active research of health risk assessment about indoor air quality.