Measuring method and system for detection efficiency of airborne radioactive iodine measuring apparatus

The invention discloses a measuring method and a measuring system for detection efficiency of an airborne radioactive iodine measuring apparatus, which can accurately scale and detect detection efficiency of the airborne radioactive iodine measuring apparatus. A technical scheme is as follows: a radioactive iodine activity reference scale is adopted for scaling and detecting to measure the detection efficiency of the airborne radioactive iodine measuring apparatus. The detection efficiency of the airborne radioactive iodine measuring apparatus is measured in a quantified manner by producing, storing and sampling gaseous iodine as well as determining measuring standards.