The intercomparison programme for the national standard dosimetry laboratory should be initiated to support the activities for assuring the quality of measurement and to harmonize the standards for ionizing radiation metrology among the Asia-Pacific region. The accurate dose measurement, especially in developing countries, requires the adequate calibration facilities and quality assurance programme such as intercomparison programme to maintain their standards. The main objective of this research is to improve the quality audit system for supporting ISO/IEC 17025 accreditation system for Standard dosimetry laboratories in East Asia and Southeast Asia by the comparison programme of Air Kerma of Cs-137 and Co-60 using Optically Stimulated Luminesence Dosimeter (OSLD). There were three Primary Standard Dosimetery Laboratories and eight Secondary Standard Dosimetry Laboratories participated in the comparison. The requested irradiation dose for radiation protection level using Cs-137 and Co-60 were 5.00 mGy and 2.00 mGy respectively at 0 degree angle of incidence in term of Air Kerma. The results show a good agreement between the standard dosimetry laboratories in Asia-Pacific region within ±2 standard deviation above the mean using z-score test. For Cs-137 intercomparison, the maximum and minimum z-score were +1.80 and -1.15 respectively. For Co-60 intercomparison, the maximum and minimum z-score were +0.90 and -0.96 respectively.