Abstract:In order to accurately evaluate the safety and reliability of old buildings and reduce potential safety risks, this article starts with an overview of non-destructive testing technology, and constructs a scientific and reasonable system for identifying and evaluating structural performance degradation to detect internal defects, material strength, structural deformation, etc. of old building structures. This effectively improves the scientific and accurate identification of structural performance degradation in old buildings and provides strong technical support for the maintenance, reinforcement, and safety management of old buildings.