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The MET/CAL platform, produced by Fluke, is a powerful auto calibration platform, which is consist of asset management, program editor and runtime. To make the best of MET/CAL and to complete the auto-calibration for digital oscilloscope, the auto-calibration for digital oscilloscope base on MET/CAL platform was developed. This Article gave a introduction of the MET/CAL environment and Functional Select Code (FSC), details the hardware of the system and the development process of the software, especially focus on the models such as instrument identity, system setup, selection of calibration items, calibration process. In the end, the system’s accuracy and reliability can be verified by compare between auto-calibration and manual operation in results and uncertainty.