The invention discloses a flight departure sorting system and a method. The system comprises a data input interface for receiving flight departure data, sorting and analyzing the flight departure data, and respectively transmitting the sorted data according to the processing result; a business flow processing module connected with the data input interface module for constructing business flow examples for each flight according to the received flight departure data; an operation limiting module connected with the data input interface module for constructing an operation condition model for an airport according to the received flight departure data; and a decision module connected with the business flow processing module and the operation limiting module for making departure schemes for each flight according to the received flight departure data, the business flow examples, the limiting rules and the condition model information. The system and the method can real-timely make or correct the departure schemes for the flights according to the actual condition of the flights flexibly and efficiently.