Natural minerals are products of different sorts of evolution in nature. They possess abundant information of environmental changes in different times and spaces during the course of formation and transformation, and hence serve as information carriers of environmental changes. The research of environmental evolutionary laws indicated by natural minerals in loess layers, rivers, lakes, sea and atmosphere can recognize the relationship between environmental changes and micromorphology, microstructure, chemical composition, chemical property, geophysical property, genesis and paragenetic associations of minerals. Minerals can thus be used as information carriers.