Using literature review and interview with professionals,this paper identifies 32 barrier factors of project cost information construction. Through questionnaire survey and factor analysis technique,this paper categorizes the barrier factors into nine key factors which are further ranked in accordance with their importance indices. The study found that insignificance of government support and information environment,and lack of standards have greatest impact on project cost information construction. Then institutional security system of project cost information construction are analyzed based on barriers removal, finally this paper extracts four class institutional security systems so as to ensure the rapid development of project cost information construction and promote reform of the entire project cost consulting industry.%通过文献回顾和专家访谈等方式识别出工程造价信息化建设的32个障碍因素，采用问卷调查和因子分析等方法将这些因素提炼为9个关键因素，并计算它们的重要性指数及对其排序，研究发现：政府支持不足、信息化环境不足及缺乏标准体系对工程造价信息化建设影响最大。并以清除这些障碍为原则，研究工程造价信息化建设的制度保障，最终提炼出4类制度保障体系，用以保证我国工程造价信息化建设快速发展及促进整个工程造价咨询行业的改革。
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