A method based on the G-S algorithm is presented,using beam angular spectrum transmit formula to iterate the phase that the compensation for the near-field intensity distribution requires. The iterative algorithm used in the control of beam near-field intensity is presented. Based on this algorithm,an adaptive optics system to achieve control of beam near-field intensity is designed,and numerical simulation and experiments verify the feasibility of this method. The experimental results show that the similarity value ε,which is the distribution of beam near-field amplitude comparing to the ideal distribution of the amplitude,has been improved from 0.718 to 0.966 when the adaptive system working. This indicates that the system is effective in controlling the beam near-field intensity.