1. A temperature control device, comprising:a fan configured to drive airflows for controlling a temperature of a controlled region;
a temperature sensor disposed in the controlled region and obtaining a detected temperature, with the detected temperature indicating the temperature of the controlled region;
a modeling circuit obtaining at least one cooling parameter group based on a transfer function; and
a PID controller connected to the fan, the temperature sensor and the modeling circuit with respect to a temperature threshold so as to approach but not exceed the temperature threshold, controlling the fan based on an initial parameter group when the detected temperature is lower than a first temperature and the temperature threshold, and controlling the fan based on a first parameter group of said at least one cooling parameter group when the detected temperature is equal to or higher than the first temperature and lower than a second temperature as the detected temperature approaches the temperature threshold, and controlling the fan based on a second parameter group of said at least one cooling parameter group for reducing a variation of the speed of the fan when the detected temperature is equal to or higher than the second temperature and the temperature further approaches the temperature threshold;
wherein the initial parameter group comprises a plurality of initial parameters, with a value of each of the plurality of initial parameters equal to a preset value, and
wherein the first temperature is 0.63 times as high as the threshold temperature and the second temperature is 97% of the threshold temperature.