This study aims to design and develop a system software for calibrating clock testers,address-ing issues such as low calibration efficiency and lack of informatization in existing clock tester calibration systems.This thesis proposes a modular design-based solution after in-depth analysis of the working prin-ciples and calibration requirements of clock testers.The software includes modules such as user inter-face,data acquisition,data processing,and certificate synthesis.Through software testing,the results show that the software can operate reliably under various operating conditions and produce accurate cali-bration data.The development of this system software not only improves the calibration efficiency of clock testers and reduces maintenance costs but also lays the foundation for future developments in calibration technology.