Dale Carnegie, the greatest spiritual mentor in the 20th century, used a lot of stories about ordinary people's continuous efforts to achieve success, and aroused the fighting spirit of countless lost people through speeches and books, encouraging them to achieve brilliant success. Dale Carnegie is the greatest master of success in the 20th century and the father of modern American adult education. Carnegie's works written on the basis of practice are the best-selling successful inspirational classics in the 20th century. Carnegie's main representative works are: Art of Communication, Weaknesses of Human Nature, Advantages of Human Nature, Beautiful Life, Happy Life, Great Man and Glory of Human Nature. After the publication of these books, they immediately swept the world and were translated into dozens of languages, which were hailed as "miracles in the history of human publishing". He devoted himself to the study of human nature all his life, explored and analyzed the common psychological characteristics of human beings by using the knowledge of psychology and sociology, and created and displayed a unique adult education model integrating speech, sales promotion, social life and intelligent development. Carnegie was accepted by people from all walks of life, including many military and political dignitaries and even several American presidents. Millions of people in Qian Qian have benefited a lot from Carnegie's education.