A　mathematical　expression　of　the　quantitative　causal　principle　is　given,　using　the　expression　this　letter　shows　the　unified　expressions　of　D＇Alembert-Lagrange,　virtual　work,　Jourdian,　Gauss　and　general　D＇Alembert-Lagrange　principles　of　differential　style,　first　finds　the　intrinsic　relations　among　these　variational　principles,　the　conservation　quantities　of　the　above　principles　are　first　found,　finally　the　Noether　conservation　charges　of　the　all　differential　variational　principles　in　the　systems　with　the　symmetry　of　Lie　group　D-m　are　first　obtained.　(C)　2003　Published　by　Elsevier　Ltd.