Communication countermeasure combat effectiveness evaluation is related to the adjustment of combat means and system command coordination. As qualitative description of communication countermeasure combat effectiveness evaluation is difficult to accurately to evaluate, Combination method, which combines objective evaluation and subjective evaluation effectively is adopted, and the weight distribution of the evaluation index is more scientific and reasonable. The cloud model is used to evaluate the operational effectiveness of communication countermeasures, the forward cloud generator can transform the qualitative evaluation results into quantitative computable values, and then the final operational effectiveness evaluation results can be obtained by the reverse cloud generator. The results show that this method can integrate subjective and objective information well, effectively integrate fuzziness and randomness, and has strong operability. It can provide an effective method for evaluating the effectiveness of communication countermeasures.