This study was conducted to develop the questionnaire for the measurement of safety perceptions and attitudes and test its reliability and validity. 10Experts of construction safety selected each 20 questions to survey safety perception and attitude of managers and labors. Two types of questionnaire were distributed, total 277 people responded to the survey. The SPSS package program was used in both the reliability and validity analysis of surveyed data. The reliability of the each questionnaire was analysed to be appropriate after correcting and modifying the questionnaires. The validity of the questionnaires was sufficiently affirmed through Kruska-Wallis and Mann-Whitney test This study confirmed that it is appropriate to apply DAGMAR to the questionnaires for ease and direction of improvement.