GB/T 43784-2024 "Single photon source performance characterization and Measuring method" describes in detail the parameters used to characterize the performance of single photon sources and the corresponding Measuring method. This standard is suitable for evaluating and testing the performance of single photon sources, including the measurement of photon flux, that is, the number of photons emitted, transmitted or received per unit time. The terminology and definitions section clarifies key concepts, such as "single photon source", which refers to a Light source that emits 1 photon number with 100% probability in the effective period. The standard refers to GB/T 3102.6-1993 "Quantities and Units of Light and Related Electromagnetic Radiation" and JJF 1032-2005 "Optical Inspection Radiation Measurement Terminology and Definitions" to ensure the accuracy and standardization of terms.