Disclosed herein is a system and method for objectively and efficiently managing a postal delivery operation load. A system for managing a postal delivery operation load includes: a postal delivery operation load calculator for calculating a postal delivery operation load for each postal delivery unit and for each period based on input postal delivery data; a postal delivery operation load calculation result manager for managing the postal delivery operation load for each postal delivery unit based on the postal delivery operation load calculation result provided by the postal delivery operation load calculator; and a postal delivery operation load adjuster for adjusting and leveling the postal delivery operation based on postal delivery operation load management information provided by the postal delivery operation load calculation result manager.