This paper presents a study on the design and implementation of an intelligent wheeled robot capable of automatic following based on human dynamic behavior. The robot, centered around an STM32F103CET6 microcontroller, is equipped with four-wheel drive and a suite of sensors that enable intelligent following, obstacle avoidance, and wireless remote control. By utilizing angle sensors to capture the orientation of a handheld controller and ultrasonic distance sensors to measure the distance between the controller and the robot, the system can accurately determine the position and orientation of the handheld controller relative to the robot. The dynamic behavior of the human body is then acquired, and a PID control algorithm is applied to regulate the speed of the robot’s wheels, ensuring precise following in terms of distance and angle. Experimental results demonstrate the system's strong stability, with an average absolute error of 1.6 cm, and its ability to accurately and flexibly follow target movements.