Earth heat cooling and heating system connected to stable ventilation and control method

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A geothermal cooling and heating system and a control method thereof are provided, which improve the productivity by obtaining the propriety feed environment of the domestic animals. A geothermal cooling and heating system control method comprises : a step of operating the large size blower and the secondary blower by delivering a signal to the ventilation controller from the main controller; a step of comparing the temperature of the cattle shed with the maximum value and minimum setting value; a step of supplying the cold air to the inside of the cattle shed; and a step of supplying the warm air to the cattle shed.