Abstract: This paper initially designs 25 affecting factors of choosing generic technology according to its characteristics, and gets 18 main affecting factors by scientifically screening, then uses PCA to confirm the weight of factors and calculation formula of generic technology choosing, next, invites experts in related regions to score the candidates of generic technology by using Improved Delphi Method, finally chooses the one that government plans to develop, and also lists a detail example.

Key words: Generic Technology, Selection Method, PCA, Improved Delphi Method

摘要： 首先根据共性技术的特点，初步设计了共性技术选择的25个影响因素，并利用问卷调查结果进一步筛选出共性技术选择的18个主要影响因素；再利用主成分分析法确定主要影响因素的重要性程度系数，给出了共性技术选择的打分公式；最后运用改进的德尔菲方法邀请相关领域专家对候选共性技术进行打分，依据得分大小，可为政府购买的共性技术决策提供依据，并选择出政府拟开发的共性技术。并已给出了一个决策案例。

关键词: 共性技术, 选择方法, 主成分分析法, 改进的德尔菲方法