As infrared temperature measurement system is beyond effective working distance,measurement accuracy will decrease.To solve this problem,starting from thermal infrared radiation theory,a novel error correction method was proposed,which can be applied to the situation that the field of view is beyond the irradiated area of the object.Radiation illumination within whole visual field was calculated to obtain corresponding voltage response of infrared temperature measurement system.According to the relationship between voltage response and temperature and morphology characteristics of object surface,the influence of background temperature within whole visual field was removed,and real temperature values of object surface were obtained.Compared with previous correction methods,this method can effectively correct the temperature of object surface when temperature measurement system exceeds effective working distance.And the corrected results are closer to the actual temperature of object.Therefore,this method can greatly enhance the industrial applicability of infrared temperature measurement system.