Abstract: On the basis of the experience of relevant experts and relevant literatures, the authors propose a variable set for evaluating ongoing R&D projects. An improved Fuzzy pattern recognition method is further presented and applied successfully to terminating decision for ongoing R&D projects of some aircraft company. There are two improvements in the method. First, the weights of the variables are computed by the statistic method. Then, the distance between the samples is calculated with the generalized Euclid distance expressions. The empirical study shows the generalized Euclid distance expressions proposed here is practical and the result of its implementation is effective.