Based on drawing lessons from some present theories and methods,this paper puts forward Tourism System Evolutionary Trend Model(Abbr.TSEM),which including Tourism System Evolutionary Trend Conceptual Model(Abbr.TSECM) and Tourism System Evolutionary Trend Mathematical Model(Abbr.TSEMM).This model can help you to make a deep acknowledge of the real Trend and fluctuation trend of tourism and make accurate assessment to a major event for tourism,so as to enhance awareness of the process of tourism development,...