Abstract: To store tall loads on a pallet (P) supported by the pallet retaining shelves (R) of a shelf frame (3), irrespective of a pitch dimension between the pallet supporting shelf crosspieces (13), the pallet carry-in management system includes: a pallet presence/absence state management section (57) for managing pallet presence or absence status of the respective pallet retaining shelves (R); a vertically continuous vacant shelf management section (59) for managing a position and the number of stages of the vacant pallet retaining shelves (R) on which no pallets are carried-in vertically continuously, on the basis of management information transmitted by the pallet presence/absence state management section; and a maximum allowable load height calculating section (61) for calculating an maximum allowable height of loads to be mounted on the vacant pallet retaining shelves (R), on the basis of the position and number of stages of the vacant pallet retaining shelf information transmitted by the vertically continuous