Vision navigation has become one of the main navigation methods of micro air vehicles. In order to provide a platform for the research of visual navigation technology, a digital image realtime acquisition and transmission scheme is designed. The IEEE 1394b bus is used as the transmission protocol. FPGA, as the control core, generates the timing control logic of the image sensor, FIFO buffer module and 1394b protocol link layer IP core. The image data is packaged into the 1394b format after the FIFO buffer, and then transmitted to the computer with a 1394b acquisition board through the optical fiber after signal conversation. The C++ Visual is used to process the received data, and the display and memory functions of the images are realized. Test results show that the average transmission rate of the system is 123.264 Mb/s, which could meet realtime requirements.