Abstract: The development of Three-dimension sound intensity technology is of significance to the field of acoustic measurement． The three-dimension sound intensity calibration technology is to ensure the accuracy of three-dimension sound intensity measurement． This paper is mainly about the transfer function method to calibrate the three-dimension sound intensity measurement system，and to measure the amplitude error and directional error of the system in the whole anechoic chamber． Under the premise of ensuring accuracy，the measurement environment can be approximated as a planar sound field to simplify the calculation． It can be known from the actual measurement results that the adoption of the three-dimension sound intensity calibration system described in the text can ensure that the sound intensity probe has a high measurement accuracy． when f = 1 000 Hz，the difference between the amplitude error simulation and the value measured is less than 1. 4dB，and the difference between the directional error simulation and the value measured is less than 10°． Three-dimension sound intensity calibration system is to ensure that the sound intensity probe with a high accuracy．

Key words: three-dimension sound intensity measurement, three-dimension sound intensity calibration, transfer function method, amplitude error, directional errors