Abstract: Radon and its short-lived progeny constitute the major source of natural radiation exposure to the public, and their accurate measurement forms an important technical basis for environmental radiation monitoring and radiation protection. This paper conducts a comparative study between the ISO 11665 series of international standards and relevant Chinese standards for the measurement of radon and its progeny. It systematically compares their differences in terms of system architecture, measurement methods, key technical parameters and practical application orientation. The analysis reveals notable deficiencies in Chinese standards, including fragmented standard system, outdated versions of some standards, lack of direct measurement methods for radon progeny, and absence of standardized specifications for alpha-spectrometry. To address these issues, this paper proposes an idea for integrating and revising domestic standards by drawing on the ISO 11665 series. A 16-part standard system framework “Measurement Methods for Radon and Its Progeny in Air” is constructed, which consists of three tiers: general principles, measurement principles, and application fields. It provides a systematic reference for establishing a well-coordinated and comprehensive domestic standard system for radon measurement.

Key words: radon, radon progeny, measurement standards, ISO 11665, integration of standard systems, alpha spectrometry