A temperature control system based on proportional-integral-differential（ PID） algorithm and using STC12 C5 A60 S2 microcontroller unit（ MCU） as the core controller is designed

in view of current agricultural production gradually shift to the needs of the economy. The system can set appropriate temperature

according to temperature requirements of different crops in greenhouse growth environment

and start the corresponding heating or cooling equipment automatically according to the degree of the measured temperature deviate from the set temperature to adjust the room temperature to the set temperature range

achieve a rapid

stable and accurate control. Through simulation analysis and software and hardware test

it shows that the system achieves ideal effect because of stable running and high control precision

it has certain application value and popularization value.