The invention relates to a temperature control device. The temperature control device comprises a semiconductor chilling plate, a first heat exchanger, a second heat exchanger, a water pump, a hot water tank, a cold water tank, a valve and the like. According to the temperature control device, based on the principle of heating by use of one side of the semiconductor chilling plate and chilling by use of the other side of the semiconductor chilling plate, the heating surface and the condensing surface of the semiconductor chilling plate are tightly fitted with the heat exchangers respectively; the heat exchanger on the heating surface is communicated with the hot water tank, while the heat exchanger on the condensing surface is communicated with the cold water tank; water in the two water tanks is heated and cooled by use of the heat exchangers, so that a heat source and a cold source different in temperature can be provided. The temperatures in the hot water tank, the cold water tank and a mixer are detected in real time by use of temperature sensors; when temperatures change, a control system is capable of performing adjustment according to the change of the temperatures in the hot water tank, the cold water tank and the mixer in real time; as a result, the temperature control device is quick in temperature control, excellent in constant temperature accuracy, and the corresponding needed energy is greatly reduced.