Abstract: Based on the requirement of high-precision near-infrared data acquisition system and the characteristics of infrared detectors, two different types of data acquisition systems are designed, which can achieve the expected accuracy. In addition, a direct current analog-to-digital acquisition system is designed, which simplifies the circuit structure of the acquisition system and provides a reference for the design of near-infrared spectrum measurement system. Three different designs of data acquisition system for near-infrared detector are provided, and relevant analysis circuit is implemented to analyze each circuit's feature and its application environment.