In the last decade, different vocalities and songs are classified in all kinds of vocal music competitions, giving the definitions as Bel Canto, National Way of Singing and Method in Popular Singing, which is popularly accepted in the field. But the fact is that the definitions and classifications of the above-mentioned three ways of singing can be further discussed. These three ways of singing have the common features: they share the same vocalizing principle, i.e. the scientific vocalization is applied to the singing. Once the singer masters the correct ways of singing and use it flexibly, the different types and styles of songs can be achieved simultaneously.