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As a general parallel bus, IEEE488 is widely used in instrument control and test systems with its advantages of low delay and reliable transmission.At present, special GPIB chips conforming to IEEE488 interface protocol, such as nat9914, upd7210 and mc68488, have been discontinued,GPIB controller on sale has few types and is very expensive, which is difficult to meet the needs of the domestic market.Therefore, a scheme of implementing IEEE488 interface protocol based on FPGA technology is proposed, based on the typical GPIB interface chip nat9914,using Verilog language to describe GPIB interface functions,Call the visa virtual instrument function library to develop the driver to communicate with the equipment, establish a complete automatic test system, and program control and data acquisition of the instrument through SCPI instructions. After testing, the product has stable performance, can meet the needs of practical application, and the cost is low, so it has a certain market value.