The invention relates to a warehouse system and a method of operating the same, whereby a plurality of different packaging units (2) are placed in storage on delivery pallets as storage units in a goods-in store (4). The properties of the packaging units are detected in a data bank and a conveying property is determined from the packaging unit properties, and a classification group is assigned to the packaging units (2) by a computer. The packaging units (2) are distributed, temporarily stored and loaded onto despatch pallets in the warehouse system in accordance with the classification group.