Abstract: This paper uses a microcontroller as the control core, developing the original motor control system that relied on analog circuits to achieve various functions into a novel microcontroller-based asynchronous motor feedback control system. First, the parameters of the motor are determined through no-load and short-circuit experiments as the basis for calculating the motor's operating characteristics using equivalent circuits. Then, the system design is described in detail, including the controllable rectifier circuit, trigger circuit, and the microcontroller's operating modes. The design of this system conforms to the current trend of digital development in motors abroad, fully utilizing the advantages of microcontrollers and improving its versatility. Keywords: Feedback control; Microcontroller; Asynchronous motor In today's electrical age, electric motors have always played a vital role in modern production and life. Various types of electric motors are widely used in industrial and agricultural production, transportation, national defense, aerospace, medical and health care, commercial and office equipment, and even in household appliances. Electric motor control can generally be divided into two types: simple control and complex control. Simple control refers to starting, braking, and sequential control of the motor, which can be achieved through relays, programmable logic controllers (PLCs), and switching elements. Complex control refers to controlling physical quantities such as the motor's speed, angle, torque, voltage, and current, and often requires very high precision. Previously, simple motor control was more common, but with increasingly higher requirements for motor control levels, complex motor control is gradually becoming the mainstream application. Previously, motors were mostly controlled using control cabinets composed of analog circuits; now, microcontrollers are beginning to replace analog circuits as motor controllers. Due to the advantages of microcontrollers, such as simple circuitry, flexibility, and strong adaptability, this paper uses the 8051 microcontroller to design and study an asynchronous motor feedback control system. For details, please click: Design and Research of an Asynchronous Motor Feedback Control System.