A diversion system comprising: a storage tank and a pumping apparatus , the storage tank used for storing a cooling medium , and the pumping apparatus comprising an inlet and an outlet , wherein a first pipeline is connected between a cooling device and the outlet of the pumping apparatus, a second pipeline is connected between the storage tank and the outlet of the pumping apparatus, a third pipeline is connected between the cooling device and the inlet of the pumping apparatus, a fourth pipeline is connected between the storage tank and the inlet of the pumping apparatus, and the first pipeline, the second pipeline, the third pipeline, and the fourth pipeline can selectively be conducting or be closed; and wherein when the diversion system is operating, one of the first or the second pipelines is conducting, and one of the third or the fourth pipelines is conducting; the pumping apparatus extracts the cooling medium by one of the third or the fourth pipelines that is conducting, and conveys the cooling medium externally by one of the first or the second pipelines that is conducting; and the diversion system further comprises a first filter in communication with the second pipeline or the fourth pipeline; and wherein the diversion system comprises a third operating mode, wherein when the diversion system is in the third operating mode, the second pipeline and the fourth pipeline are conducting, and the first pipeline and the third pipeline are closed; the pumping apparatus extracts the cooling medium from the storage tank by means of the fourth pipeline, and conveys the cooling medium back to the storage tank by the second pipeline; and the first filter filters the cooling medium flowing therethrough. a first pipeline is connected between a cooling device and the outlet of the pumping apparatus, a second pipeline is connected between the storage tank and the outlet of the pumping apparatus, a third pipeline is connected between the cooling device and the inlet of the pumping apparatus, a fourth pipeline is connected between the storage tank and the inlet of the pumping apparatus, and the first pipeline, the second pipeline, the third pipeline, and the fourth pipeline can selectively be conducting or be closed; and wherein when the diversion system is operating, one of the first or the second pipelines is conducting, and one of the third or the fourth pipelines is conducting; the pumping apparatus extracts the cooling medium by one of the third or the fourth pipelines that is conducting, and conveys the cooling medium externally by one of the first or the second pipelines that is conducting; and the diversion system further comprises a first filter in communication with the second pipeline or the fourth pipeline; and wherein the diversion system comprises a third operating mode, wherein when the diversion system is in the third operating mode, the second pipeline and the fourth pipeline are conducting, and the first pipeline and the third pipeline are closed; the pumping apparatus extracts the cooling medium from the storage tank by means of the fourth pipeline, and conveys the cooling medium back to the storage tank by the second pipeline; and the first filter filters the cooling medium flowing therethrough. <EOS>