The invention discloses a transformer integrated testing system based on a mobile square bin, which comprises a bin body. A walking mechanism is arranged below the bin body; one end of the bin body is connected with a vehicle head; the other end of the bin body is provided with an inlet/outlet and a sealing door; and the bin body is internally provided with a lifting device, a maintenance platform, a tool platform and an air adjusting device. The square bin provides a proper environment for the maintenance work of the transformer in the case of movement, humid and dusty air can be prevented from damaging parts inside the transformer, the maintenance work can be ensured to be carried out smoothly and safely, and great convenience is provided for the maintenance work.