A maintenance system for a transport and storage facility including storage racks arranged so as to form at least one access aisle, the maintenance system having a supporting chassis, a mobile platform intended to receive an operator, a lifting device interposed between the mobile platform and the supporting chassis, and configured to make it possible to raise the mobile platform and retract it towards the supporting chassis, and a device for vertically guiding and stabilizing the mobile platform, the vertical guiding and stabilizing device having at least one guide member configured to interact with a storage rack upright facing onto the respective access aisle.