简要叙述克莱因(F.Klein)几何观点，介绍几个仿射不变量，探讨如何利用仿射变换中的不变量解决一些初等几何问题，体现了高等几何对初等几何有重要的指导意义。%The present paper narrates F.Klein’s geometric vienpoint in brief,by introducing the definition and several characters of affine transformation, and disscussesow to solve some elementary geometric proplems by use of the invanable and invanability in affine transformation and,manifest the important guiding sense of higher geometry to elementary geometry.
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