Temperature control device and method thereof

A temperature control device comprises a fan, a temperature sensor, a parameter modulating unit and a proportional-integral-derivative (PID) controller. The fan is configured to control the temperature of a controlled area by airflow. The temperature sensor obtains a detected temperature and is disposed at the controlled area. The detected temperature indicates the temperature of the controlled area. The parameter modulating unit calculates a temperature deviation value according to the detected temperature, an external environment value, a targeted temperature, and obtains a cooling parameter group according to the temperature deviation value. The PID controller controls the fan according to an initial parameter group which includes initial parameters with the same value when the temperature deviation value is larger than a judgment threshold, and controls the fan according to the cooling parameter group when the temperature deviation value is equal to or less than the judgment threshold.