A method and system for controlling the flow of postal mail in real-time are provided. The logistical system includes a pre-application processing system, a real-time mail planning and adjusting system, and a real-time working planning and performing system. The pre-application processing system registers bulk mail inputted in a generating system, and generates sending data and quantity data of the registered bulk mail. The real-time mail planning and adjusting system collects predetermined working plan quantities to process the quantity data for respective distribution centers, and allocates temporary vehicles when a quantity for delivery between the distribution centers exceeds processing capacities of the distribution centers. The real-time working planning and performing system uses the quantity data to transfer a quantity of mail for processing to postal distribution centers, and collects and compares working plans from each of the postal distribution centers.