Although Bach had several unruly trips when he was young, he was always regarded as an honest and frank conservative musician after his marriage. Although organ technology is recognized in the world, composition is not recommended. Especially when opera is popular, writing opera is a shortcut to seek fame and fortune, and Bach has never written opera in his life. This also shows his pursuit. When it comes to being a man, Bach doesn't have Mozart's great change from frivolous to down and out, Beethoven's violent and flamboyant personality, and Chopin's concern for the country and the people and hatred for the country. He didn't leave many anecdotes about famous sayings, but in his lifelong music career, his efforts and genius created a magnificent world for future generations to explore forever. In this abstract spiritual world completely belonging to Bach, he transformed and combined simple materials with skillful skills to construct an extremely exquisite and grand structure. From the two portraits he left behind, we can only see an obscure fat man in medieval Germany with a rustic face and a juryman face. He is more like an ordinary citizen than a musician. However, his works stand at the peak of human spiritual achievements.