建立了基于粗糙集和模糊理论的装备维修保障能力评估模型.该模型采用模糊方法将定量指标和定性指标值转化为模糊数,实现指标的一致化,并利用属性重要度理论获取指标权重,最后采用模糊算子进行评估计算.实例计算结果表明,该模型能够较好的利用以往的经验数据,兼顾指标的客观信息和评估者的主观判断,评估结论较为可信. The model of equipment maintenance supportability assessment based on rough sets and fuzzy theory is established.The fuzzy model is used to convert the quantitative indexes and qualitative index values ​​into fuzzy numbers to achieve the consistency of the indexes and obtain the index weight by using the attribute importance theory.Finally, The fuzzy operator is used to evaluate and calculate.The example shows that the model can make good use of the past empirical data, take into account the objective information of the indicator and the subjective judgment of the assessor, and the evaluation conclusion is credible.