The present invention relates to a loading control apparatus capable of aligning the mail automatically. The loading control apparatus includes a distribution unit configured to guide mail, inputted to the cargo box of an unmanned receipt apparatus, to any one of a plurality of mail capacity boxes, a gravimetry unit configured to measure the weight of the mail loaded onto the mail capacity box, and a control unit configured to determine a mail capacity box onto which the mail will be loaded based on the weight received from the gravimetry unit and control the distribution unit based on a result of the determination. In accordance with the present invention, registered ordinary mail received through the unmanned receipt apparatus is automatically aligned and loaded in order of the receipt of mail.