层次分析法是将决策问题按总目标、各层子目标、评价准则直至具体的备投方案的顺序分解为不同的层次结构，然后得用求解判断矩阵特征向量的办法，求得每一层次的各元素对上一层次某元素的优先权重，最后再加权和的方法递阶归并各备择方案对总目标的最终权重，此最终权重最大者即为最优方案。这里所谓“优先权重”是一种相对的量度，它表明各备择方案在某一特点的评价准则或子目标，标下优越程度的相对量度，以及各子目标对上一层目标而言重要程度的相对量度。层次分析法比较适合于具有分层交错评价指标的目标系统，而且目标值又难于定量描述的决策问题。其用法是构造判断矩阵，求出其最大特征值。及其所对应的特征向量W，归一化后，即为某一层次指标对于上一层次某相关指标的相对重要性权值。-Analytic hierarchy process method is the decision problem according to total target, the target of STRATON,　uation criteria until the specific input sequential scheme is decomposed into different levels of the hierarchy and then to judge the eigenvector matrix method is used to calculate and obtain the elements of each level of a hierarchy of an element priority and then weighted sum method hierarchical merge the alternative scheme of final weight and the final weight maximum is the optimal solution. Here the so-called　priority　is a relative measure, it is shown that the relative measure of the alternatives in a feature　uation criteria or sub goals, under the superior degree of relative measure, as well as the target for a layer of importance. Analytic hierarchy process is suitable for having a hierarchical staggered target system of　uation index, and the target value and difficult to describe quantitatively the decision problem. The use of the method is to construct the judgment