中文摘要：

研究时间尺度上Lagrange系统Mei对称性及由Mei对称性直接导致的Mei守恒量.给出系统的Mei对称性定义和判据方程,得到系统Mei对称性直接导致的Mei守恒量的条件和形式,并举例说明结果.

英文摘要：

Mei conservation, the direct result of Mei symmetry of Lagrange system on time scales, has been studied in this paper.We have given the definition and criterion of Mei symmetry, and gets the conditions and form about the Mei conserved quantity, which is a direct result of Mei symmetry.We also have given examples to illustrate the results.