PURPOSE: To provide a management method capable of easily and efficiently managing a fractional number of pallets for product cases produced in a large number the stacking number of which does not come up to a specified amount at the time of stacking the product cases of various brands on the pallets in the specified number each for each brand unit.

CONSTITUTION: A temporarily placing rack 10 capable of managing a plural number of fractional pallets is furnished, and at the time of stacking pallets by an automatic palletizer 4 and a palletizing robot 5 which are automatic stacking means a process control device controls a stacking process so as to stack product cases on the pallets for each brand unit in a specified number in accordance with product brands of the fractional pallets temporarily placed on each individual storage space of the temporarily placing rack 10, pallet numbers, the number of the stacked products, storage space numbers and brand information of the product cases discharged from a carrier line 2.