Firstly, this paper describes and illustrates briefly the functions and structure of the Flight Management and Command Guidance System for Flight Test. Through space information technology, system can make use of GPS and data of every intelligence source well. Considering characteristic that the many kinds, many data and strong real time of intelligence processing, this thesis take twice swerve volley guide method for example, and introduces vector theory analyzing volley guide method and mathematical model of system Which will improve command guide capability. In Flight management, Using SIT to integrating flight information, according to aviation statute and requirement of flight task, systems organize planes in air management area to ensure flight safety, advance time using efficiency. The whole system has the important application value for all kinds of command guide and air management of aero craft.