Steam sterilization system and operation method thereof

The invention provides a steam sterilization system and an operation method thereof. The steam sterilization system comprises a sterilization tank body, a steam pipeline structure and a pumping and draining pipeline structure. The steam pipeline structure is connected with the sterilization tank body and is used for generating steam and inputting the steam into the sterilization tank body; the pumping and draining pipeline structure is connected with the sterilization tank body relative to the steam pipeline structure and is used for performing pumping and draining operation on the sterilization tank body; the cooling pipeline structure is opposite to the steam pipeline structure and the pumping and draining pipeline structure, is arranged corresponding to the outer surface of the sterilization tank body and is used for cooling the sterilization tank body. Therefore, steam can be provided for the sterilization tank body in real time through the steam pipeline structure arranged outside the sterilization tank