The author systematically expounds the core ideas of management based on the three elements of management: "building a team", "setting a strategy" and "leading a team". The core of management is "people", and the establishment of harmonious interpersonal relationships with division of labor and cooperation is its focus; the object of management is "things", which are "things" that make full use of various resources to meet human material and spiritual needs; the purpose of management is "results", which are to help enterprises achieve "low expenses and high income" with high efficiency. Simple and unsophisticated theories, combined with real and vivid cases, present the psychological mysteries of management to readers one by one. I hope that after reading this book, readers will be able to broaden their horizons and structure, and improve their management wisdom.