The neutron emission rate of Cf-252 source and Am-Be source was calibrated by NIST in the United States and NPL in the United Kingdom, respectively. This neutron ambient dose equivalent  calibration system was based on ISO 8529 standard, we used shadow cone method to calibrate neutron detector. The measurement uncertainty was about 2.3%. The neutron personal dose equivalent rate was based on the recommendations of the HPS N13.11 specifications. The measurement uncertainty was about was 4.6%.