The invention provides an entire closed-loop circulating fluidized bed as well as usage and an application method thereof. Third generation circulating fluidized bed equipment is improved, the problems of high energy consumption and high processing cost and the like caused by moisture and slow heat exchange speed between materials and working mediums in prior process methods, such as drying, crushing, evaporation, distillation, condensation, gasification, liquefaction, and other operations are solved; entire closed circulation work and rapid normal temperature work of scaled materials are economically realized, and an economically feasible solution scheme is provided for developing works, such as improvements of output and quality of foodstuff, medicine, chemical products and other basic raw material products, as well as energy saving and consumption reduction, cleaning production, etc.