In order to make the operational effectiveness evaluation of the electro-optic countermeasure system closer to the actual battle， according to the characteristics of the electro-optic countermeasure system， the impact of tactical application and personnel operation on the combat effectiveness is considered on the traditional ADC model， and an improved ADC model is proposed， and the model is verified by example to be closer to the actual combat situation than the traditional ADC model. The improved model can provide a scientific basis for the evaluation of the combat effectiveness of the electro-optic countermeasure system.