The invention provides an intelligent air switch and a system, and relates to the technical field of transformer substation auxiliary devices; the intelligent air switch comprises a first relay and asecond relay, and further comprises a main contact and a tripping release which are connected in sequence; the first relay is used for receiving direct current from an external I-section direct current system; when the first relay is closed, the direct current of the I-section direct current system is transmitted to the main contact; the second relay is used for receiving direct current from an external II-section direct-current system, when the second relay is closed, the direct current of the second-section direct-current system is transmitted to the main contact; the main contact is used for transmitting the direct current of the I section direct current system and the direct current of the II section direct current system to the tripping release; and the tripping release is performingtripping operation during over current of the direct current of the I section direct current system and/or the direct current of the II section direct current system. According to the intelligent airswitch, the grounding fault can be found in a relatively convenient mode, and the operation safety and stability of the electric power system can be improved.