To settle these problems, this paper based on the thinking of this article spread service field and increase the additional value of construction project, firstly studies concept of construction industry and concludes that we should explore the space of value-added output, through the broad construction industry. 为解决这一问题,本文沿着拓展服务领域、提高建筑业在建设项目上的附加价值这一思路,首先研究了建筑业的概念,认为应当以广义的建筑业为出发点来寻求增值空间。