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To satisfy the test requirements of Quantum Memory Board high-speed serial data transmission in national key project Quantum Science Experiment Satellite, this paper proposes a new solution to high-speed serial data transmission. Taking the high-speed requirement into consideration, the system takes a Nios II embedded processor as the control core. In addition, TLK2711, RS422, USB2.0 and Gigabit Ethernet are worked as the transmission interfaces. To be specific, TLK2711 and RS422 are separately used to complete the high-speed data conversion from serial to parallel and transmission between the system and Quantum Memory Board. Gigabit Ethernet which is constructed by the unique ARM+FPGA architecture contained in the Zynq-7000 chip of Xilinx, is taken to complete high-speed data transmission work. XR21V1414 chip of EXAR, which can convert USB to UART, is designed to realize the transmission of commands and telemetry data. An control system which integrates the following functions commands transmission, instruction analysis, test progress display, data frame producing, high-speed data transmission, analysis and storage is developed in Labview. The measured results show that the system has the advantages of high stability and reliability, besides the data transmission rate is up to 600 Mbps.