A cooling system , comprising a first circulation pipeline unit and a second circulation pipeline unit, wherein the first circulation pipeline unit and the second circulation pipeline unit are configured to circulate a cooling medium; the first circulation pipeline unit comprises a first water supply pipe group and a first water return pipe group , the first water supply pipe group and the first water return pipe group are connected to each other, the second circulation pipeline unit comprises a second water supply pipe group and a second water return pipe group , and the second water supply pipe group and the second water return pipe group are connected to each other; a first end of the first water supply pipe group and a first end of the first water return pipe group each are provided with a first expansion interface , a second end of the second water supply pipe group and a second end of the second water return pipe group each are provided with a second expansion interface , the first expansion interface of the first water supply pipe group is detachably connected to the second expansion interface of the second water supply pipe group , and the first expansion interface of the first water return pipe group is detachably connected to the second expansion interface of the second water return pipe group ; and the system further comprising a first exhaust valve assembly ; when both first expansion interfaces are disconnected from their corresponding second expansion interface , the first expansion interface of the first water supply pipe group and the first expansion interface of the first water return pipe group each are configured to be detachably connected to the first exhaust valve assembly . the first circulation pipeline unit comprises a first water supply pipe group and a first water return pipe group , the first water supply pipe group and the first water return pipe group are connected to each other, the second circulation pipeline unit comprises a second water supply pipe group and a second water return pipe group , and the second water supply pipe group and the second water return pipe group are connected to each other; a first end of the first water supply pipe group and a first end of the first water return pipe group each are provided with a first expansion interface , a second end of the second water supply pipe group and a second end of the second water return pipe group each are provided with a second expansion interface , the first expansion interface of the first water supply pipe group is detachably connected to the second expansion interface of the second water supply pipe group , and the first expansion interface of the first water return pipe group is detachably connected to the second expansion interface of the second water return pipe group ; and the system further comprising a first exhaust valve assembly ; when both first expansion interfaces are disconnected from their corresponding second expansion interface , the first expansion interface of the first water supply pipe group and the first expansion interface of the first water return pipe group each are configured to be detachably connected to the first exhaust valve assembly . <EOS>