Nowadays, business society is experiencing high technology stage. Can human apply AI technology to help businessmen to reduce cost. Any businessmen must hope to learn how to reduce business cost in long time. The question is what methods can be real useful to help them to reduce long time cost aim. Thus, it brings this question: Which (AI) workers be instead of traditional human workers in these different new markets? In recent years, machines had been used to be human's tasks in the performance of certain tasks related to intelligence, such as aspects of image recognition. Experts also forecast that rapid progress in the field of specialized artificial intelligence will continue. Then, it also brings this question: Does (AI) exceed that of human performance on more and more tasks? If it is truth, will some of human jobs to be disappeared? (AI) will be instead of human some simple jobs, then unemployment rate to the low skillful and low educated workers will be increased. In my this book, I shall attempt to explain how and why human may apply AI machine or other methods to help our business activities to reduce long term cost. Readers can learn fresh behavioral economic knowledge whether businessmen may choose what methods to help them to reduce business cost.