In recent years, much research has been devoted to the fly ash research; however, few have deployed the study of the research trend. In fact, grasping the research trend is imperative for enterprises and researchers. The study aims at exploring the trend change of fly ash research from 2000 to 2010. The contribution of the study includes the following two points. First, the study has found the shift of the fly ash research from shifts from “concrete” and “pulse” related issues to the focuses of “absorption” and “metal”. Second, the study finds a new way of literature survey by using the text mining method in order to explore the trend change.