For　the　sustainable　development　of　human　beings　in　the　earth　environment,　environmental　education　should　be　promoted　to　inspire　people　environmental　cognition　as　well　as　spirits　of　cherishing　the　environment,　respecting　life,　stressing　on　the　respect　for　nature,　and　coexistence　with　nature.　It　would　help　people　understand　the　roles　and　effects　of　the　natural　environment.　Environmental　knowledge　sharing　allows　people　to　change　the　thinking　of　life　and　adopt　environmental　behaviours　as　preventing　or　dealing　with　the　aftermath　when　environmental　problems　are　encountered.　A　total　of　360　copies　of　the　questionnaire　were　randomly　distributed　for　this　study　to　the　ecotourists,　and　267　valid　copies　are　retrieved,　with　a　retrieval　rate　of　74%.　The　research　results　revealed　positive　relations　between　1.　environmental　cognition　and　environmental　knowledge　sharing,　2.　environmental　knowledge　sharing,　and　environmental　behaviour,　as　well　as　3.　environmental　cognition　and　environmental　behaviour.　According　to　the　results,　suggestions　were　proposed,　expecting　to　provide　new　information　for　the　practice　as　well　as　a　reference　for　governmental　sectors　to　make　relevant　policies.　©　2019,　Scibulcom　Ltd.　All　rights　reserved.