Nowadays the industry is find a improving. The entrepreneurs of each factory are finding ways to increase their production, improve the products' quality, and lower the investment to increase profit and the research is cooperate with the A.I. Technology Industry Co.,ltd which is a steel factory.
 After the steelmaking process is done, a test is performed to determine the quality of the steel. In the past, the hired workers are responsible for testing the steel quality by striking on it and listen to the sound it makes. The process is somehow inconvenient, takes time, and biased depending each individual. 
This causes an uncertain data. That problem leads to the beginning of a research and development of the Acoustic Resonance Testing Machine. Which helps the factory to reduce their expenses and accurately determine the quality of steel.
II. METHODOLOGY