The brightness perception characteristics of the night vision vehicle head up display (HUD) information which read by the driver in the dark environment at night are studied to build the brightness adjustment model of the night vision vehicle HUD in different illumination conditions. The specific experimental system is set up to simulate different illumination conditions in which 100 drivers are chosen to evaluate the values of the minimum brightness, optimum brightness and the maximum brightness of the HUD information. The experimental data is statistically analyzed, the brightness adjustment curve and the driver brightness perception model are both presented, and the brightness law of the driver′s reading the night vision vehicle HUD under the dark environment is subsequently summarized. The experimental results show that the proposed model can be used as the quantitative reference for the engineering design optimization of the night vision vehicle HUD and improve the efficiency and user experience of human-computer interaction.