For the lack of processing power and backward technology, satellites cannot achieve real-time processing of multi-source data in orbit in the space-based system, so this paper presents a design of a space-based network universal service platform for micro satellites in the medium and low orbit. This design provides a new hardware architecture for the development of current satellite technology. At the same time, this heterogeneous architecture cannot only achieve the independent operation of the satellites, but it can also provide hardware acceleration for the data processing of the onboard computers. This paper mainly introduces the hardware design of space-based network universal service platform, including chip selection, external relations, and the required storage capacity. In order to realize the compatibility of the interface, the module of the MIL-STD-1553B bus is designed and implemented on the FPGA to send data from the bus controller to the remote terminal.