Personality determines a person's behavior to a large extent. Everyone in the world has their own personality. From the outside, personality refers to a unique and stable behavior pattern, and from the inside, it refers to a unique and stable attitude, thought, cognition, etc. If you pay attention to the behavior of yourself and others, you will find that every move of our body tells others: What kind of person am I! Because the way our bodies react often betrays our personalities. In the same way, our understanding of a person's personality can not only grasp his current behavior, but also predict his future behavior based on his personality. Everyone hopes to understand themselves and others. Human psychology is not impenetrable. In fact, it is very simple. "Behavioral Psychology" analyzes psychology through behavior, allowing you to gradually understand the depths of your own heart in daily life, and helping you analyze the behavior and personality of the people around you. I hope this book can give some guidance to those readers who are not good at recognizing people. On the basis of learning how to recognize people, they can master the strategies of dealing with others. Not only can they succeed in the workplace, but they can also gain a happy marriage and achieve an invincible and superb state.