Abstract: In order to overcome the incomplete of single model on uncertainty，the universal uncertain model on uncertainty is proposed in this paper.And the application of universal uncertain model in intelligent decision support system is given.Firstly on the basis of explanation of connotation of uncertainty，the universal uncertain model on uncertainty is created.Then representation and reasoning of knowledge based on universal uncertain model is proposed.Lastly the framework of intelligent decision support system based on universal model is given.The universal uncertain model on uncertain can comprehensively depict uncertainty.

Key words: uncertainty, universal uncertain model, intelligent decision support system

摘要： 为了克服单一模型描述的不确定的片面性，提出了描述不确定性的综合描述模型，并给出了在智能决策支持系统中的应用。首先在不确定性内涵的阐释的基础上，建立了不确定性的综合描述模型。然后给出了基于不确定性的综合描述模型的不确定知识表示和推理方法。最后给出了基于综合描述模型的智能决策支持系统的体系结构。不确定性的综合描述模型具有全面客观描述不确定性的优点。

关键词: 不确定性, 综合描述模型, 智能决策支持系统