Abstract
The purpose of this paper is to investigate the characteristics of human constitution adapting to environment. Human constitution adapting to climate zone is basically classified into four types: The $Af^{\ominus}$ constitution adapting to warm-humid climate, the $Aw^{\ominus}$ constitution adapting to warm-arid climate, the $Dw^{\oplus}$ constitution adapting to cold-arid climate and the $Df^{\oplus}$ constitution adapting to cold-humid climate. The ${\ominus}constitution$ can be changed into a ${\oplus}constitution$ by adapting to cold climate or by heredity combination with the ${\oplus}constitution$. The ${\oplus}constitution$ can be changed into a ${\ominus}constitution$ by adapting to warm climate or by heredity combination with the ${\ominus}constitution$. The four constitution types consequently can be classified into eight types: The $Af^{\ominus}$ constitution, the $Af^{\oplus}$ constitution, the $Aw^{\ominus}$ constitution, the $Aw^{\oplus}$ constitution, the $Dw^{\oplus}$ constitution, the $Dw^{\ominus}$ constitution, the $Df^{\oplus}$ constitution and the $Df^{\ominus}$ constitution. This study investigated the characteristics of fingers of people with these constitutions and confirmed that the fingers of the ${\ominus}constitution$ man are longer, slender and cooler than the fingers of the ${\oplus}constitution$ man.