The invention is applicable to the technical field of electric equipment, and provides a switching device and a switching system. The switching device comprises a first input unit, a first output unit, a second input unit, a second output unit, a switch unit and a ground unit. The first input unit is connected with the first output unit through the switching unit, the second input unit is connected with the second output unit through the switching unit, and the switching unit is connected with the ground unit. Wherein the first output unit is also connected with the ground unit through the switching unit, The second output unit is also connected with the grounding unit through the switching unit, and a plurality of items of distribution transformer test detection can be realized by controlling the closing mode of the switching unit. At the same time, the problems of low detection efficiency and potential safety hazards caused by the traditional manual wire change can be solved by adopting the switching control.