The invention relates to an FPGA-based SDRAM control system. The system comprises an RAM read-write control module, an interface conversion module and an SDRAM controller IP module, wherein the interface conversion module comprises an RAM read-write control interface, a selection sub-module and at least two conversion sub-modules; the SDRAM controller IP module comprises at least two controller IP sub-modules; the at least two controller IP sub-modules are different from each other; the at least two conversion sub-modules are used for realizing conversion between an RAM interface specification and different types of SDRAM controller IP interface specifications; and the at least two conversion sub-modules are in one-to-one correspondence with the at least two controller IP sub-modules. According to the system, an SDRAM can be conveniently and quickly used in FPGAs of different manufacturers, so that the universality of the FPGAs for SDRAM control is extended.