根据我的搜索,工程经济学属于经济学范围,而不是建筑学
Engineering economics, previously known as engineering economy, is a subset of economics for application to engineering projects. Engineers seek solutions to problems, and the economic viability of each potential solution is normally considered along with the technical aspects.
全文见
http://en.wikipedia.org/wiki/Engineering_Economics
有可能楼主被国内大学盲目扩增学科而忽悠了