It　is　fundamentally　important　to　offer　efficient　information　services　for　all　types　of　users　weather　the　information　service　platform　is　survived　and　sustainable.　This　article　adopts　Petri　net　to　describe　the　coordination　mechanisms,　and　constructs　three　strategies　to　avoid　conflicts　among　activities　of　service　demanders　by　analyzing　two　types　of　service　activity　conflicts　of　information　service　platform.　In　the　end,　it　shows　we　can　take　coordination　strategies　to　avoid　service　activity　conflicts　by　an　application　case　of　a　certain　technology　information　platform.