This paper introduces the digital transformation status and achievements of domestic and foreign aviation maintenance enterprises under the wave of digitalization, analyzes the elements and organization of testing and metrology business in aircraft operation and maintenance, proposes a digital construction method for testing and metrology business, including resource digitization, data digitization, process digitization, and signature digitization, around the goal of improving maintenance work quality and efficiency while ensuring safety, and discusses the expected effects , providing ideas for establishing a unified digital standard in the civil aviation maintenance field.