The temperature control in the laboratory plays a decisive role in the physical experimental results．Under the premise of low cost，the intelligent temperature controller improves the temperature control accuracy and stability of the temperature control of old laboratory equipment as much as possible．Based on STM32 single-chip microcomputer，the intelligent temperature controller uses DS18B20 temperature sensor to measure temperature，uses intelligent LCD touch screen and voice synthesis module to display，and at the same time uses fuzzy PID control algorithm，using heating tube and TEC semiconductor refrigeration chip to realize dynamic temperature control．Compared with the traditional temperature control instrument using the position control algorithm，the intelligent temperature controller has higher temperature control accuracy，stronger stability，higher response rate and lower noise，which meets the project design requirements of energy saving

and environmental protection．