In my this book fourth part, I shall considerate on businessmen and customers both beneficial view point to explain how to apply behavioral economic concept to predict how their specific industries marketing development trend or consumer behavioral changing trend in these micro economic (individual consumer psychological shopping change trend) and macro-economic (global every specific industry marketing changing trend) environment. This third part researches this two questions: Has it relationship between macro and micro economic environment change factors to influence marketing development change trend? Can businessmen apply macro and micro economic methods to predict future marketing development change trend in their specific industries? In this book final part, I shall attempt to explain how and why human behavior may influence future robot needs whether any AI kinds of products may be influenced to increase or decrease.