Composite Thermostatic Cooling System

A composite thermostatic cooling system includes at least two types of cooling devices. A first type cooling device adjusts the temperature of a storage space, and the liquid coolant thereof circulates in a first tube loop with a first heat exchanger. A second type cooling device adjusts the temperature of each heat generation source in each storage box in the storage space, and the liquid coolant thereof circulates in a second tube loop with a second heat exchanger. The temperatures of the two coolants are adjusted by a refrigerant circulating in a third tube loop including: a branch connected to an expansion valve and the first heat exchanger, another branch connected to another expansion valve and the second heat exchanger, and a main loop connected to a compressor, a condenser, a dryer and the two branches. Thus, the temperatures of the heat generation sources are maintained to be the same.