Abstract: A metrology management system supported by the Internet of Things and blockchain is proposed to address the quality management issues in the aerospace field and adapt to the development direction of digital transformation in metrology.The main research objective is to improve testing efficiency and ensure data security,focusing on the transmission of out of range values and customer data privacy issues.By integrating IoT technology and blockchain technology,the system achieves real-time data collection,device interconnection,and remote monitoring,while ensuring data immutability and privacy protection.Introduced smart contracts to automate the testing process,and combined with intelligent anomaly detection algorithms and equipment monitoring systems,the problem of out of range value transmission in the measurement process is effectively solved.The measurement management system empowered by the Internet of Things and blockchain technology can capture and process abnormal values in real time,and prevent potential risks of customer data leakage through the privacy protection mechanism of blockchain.This solution provides an efficient,safe,and automated feasible approach for quality management in the aerospace field,creating practical application value for enhancing the competitiveness of metrology testing and customer trust.

Key words: Internet of Things（IoT）, Blockchain, Quality management, Data security, Metrology management system