Abstract: For the assurance of the quality of buildings, it is necessary to test the quality of building materials. Nondestructive testing is a kind of measuring technology commonly used on the testing of the quality of building materials. A new nondestructive testing method in the measuring of the Young’s Modulus of building materials is introduced. It utilizes the mature computer software and hardware and the powerful Visual Basic software development system, so it is very convenient and quick to measure the dynamic Young’s Modulus of building materials. It has the advantage of stabilized and reliable result, excellent interface and an extraordinary simple system. The technology has been successfully applied on the product developed by the author.