After summarizing the features of networked measurement instruments specifically, they are divided into class Ⅰnetworked measurement instrument and classⅡnetworked measurement instrument based on the different usage of host computer in networked measurement instrument. This paper proposes that we can use methods like laboratory calibration, online calibration or offline calibration to calibrate classⅠnetworked measurement instrument, and use methods like online calibration or offline calibration to calibrate classⅡnetworked measurement instrument based on summarizing the study achievements of networked measurement instrument’s traceability and calibration methods referring to the traditional instrument and virtual instrument’s traceability and calibration methods. Finally, networked electric energy metering system is used to explain the implement of networked measurement instrument’s traceability and calibration.