Abstract: The design and simulation of an integrated fire/flight control (IFFC) system in the air-to-air missile attack is studied in this paper. The mathematic model of the system and computer simulation are given. The simulation results show that the system has a good attack performance, the aim error can be removed quickly, and the automation of missile attack is fessible in the IFFC system. The design of whole system here provides a methodology for the study of IFFC system.