Abstract: A temperature control system used for a server system includes a liquid cooling module used for performing heat exchange for the server system through a first fluid and a second fluid, an air-cooled module used for providing a heat-dissipating airflow to the server system; and a control unit coupling the liquid cooling module and the air-cooled module. The control unit is used for adjusting a plurality of temperature adjustment parameters based on the environmental condition of the server system and thereby controlling the liquid cooling module and the air-cooled module at the same time, so as to make the liquid cooling module and the air-cooled module perform a heat-dissipating process according to the corresponding temperature adjustment parameters, and to reduce a environment temperature of the server system. The control unit is further used for adjusting the order of the temperature adjustment parameters based on a scheduling condition.