Medium-frequency induction heating furnaces utilize temperature control systems to achieve precise temperature regulation, thereby enhancing product quality and yield rates. As systems with significant thermal inertia, these furnaces benefit from a control strategy that combines intelligent control with PID methods. A fuzzy PID controller-designed to adjust PID parameters in real-time based on error and the rate of error change-delivers superior performance compared to a standard PID controller. Modern induction heating furnaces are equipped with advanced control systems, such as PLC technology. PLCs serve various functions in heat treatment equipment, including the control and interlocking of field switches; acquiring temperature signals via thermocouple analog input modules to regulate heating; communicating with the furnace and other instruments for integrated control; interfacing with sensors (such as proximity switches) for displacement control and monitoring; and enabling remote control through connections to host computers and networks. The control system facilitates process monitoring and features a touchscreen interface that dynamically displays parameter curves-such as linear heating speed, voltage, current, set power, and heating temperature-in color. Process management leverages the fully automated, intelligent nature of the PLC and HMI, allowing process parameters for various metals-including heating, quenching, and tempering-to be stored digitally. Data management capabilities include recording historical data and establishing operational databases. Additionally, the system provides comprehensive monitoring and alarm displays, coordinating with power circuits, mechanical drive systems, and circulating cooling water circuits. It also supports remote monitoring of the entire induction heating system from different locations using other computers.