An automated storage/retrieval system is proposed. The system includes a control system, at least one storage unit having several levels at which loads can be picked or deposited and at least one interface conveyor for entries/exits of loads into and out of the system, and at least one elevator for a transfer of loads between the at least interface conveyor and the at least one storage unit. The at least one elevator is a multi-level elevator, and the automated storage/retrieval system furthermore includes at least one multi-level transfer device capable of simultaneously receiving, on several levels, a set of loads intended for or coming from at least one elevator; and at least one sequencer provided with elements of vertical moving and capable of transferring loads between the at least one multi-level transfer device and the at least one interface conveyor.