Abstract: In order to make sure the standardize of the dosage of 89SrCl2 injection, the standardization for the radioactivity measurement is studied, in which 4πliquid scintillator and 4πβ-γ coincidence method are used. The values of radioactivity standards are determined with six experimental set-ups in four laboratories. 4π ironization chamber method is used as the standard, the specifications of standard samples, the effect of the amount of the solution and the scale method are studied systematically. The quality-control check is completed by using 16 radioactivity meters at nine laboratories in three areas. The results show that the values of CRC-15R and CRC-30BC radioactivity meters are in coincidence within±5% at 85% of the standard value.