A data acquisition system for fiber optic gyroscope inertial navigation system based on Microsoft Visual C++ is developed.The data acquisition system consists of three functional modules:serial communication,data storage and real time display.In the serial communication module,the MSComm control in Visual C++ is used to achieve the serial communication between fiber optic gyro inertial navigation system and personal computer.The auto storage and real time display of the output acceleration,angular velocity and attitude data of the inertial navigation system are achieved by the data storage and real time display modules.The presented system has been tested repeatedly,the results show that it has stable and reliable performances and can be applied to the engineering practice.