The design and implementation of a temperature data acquisition system based on field programmable gate array（FPGA） is introduced. In the design

a four-line Rhodium（Rh） iron thermistor sensor RF50—SQ with wide temperature measurement range of 1. 2 ～ 325 K is used to improve the anti-radiation and anti-interference ability of the system

and the parallel

high-speed

multi-channel data processing and serial interface communication are realized by using the circuit design of FPGA chip. The numerical preprocessing of the original reference table of the sensor and the proper interpolation algorithm reduce the complexity of the internal circuit design of FPGA

and improve the sampling rate and measurement precision. In the field application test of the vacuum simulator

each function and characteristics show good. It provides a new measuring method for the low temperature test technology.