中文摘要：

科学数据是人类科学活动成果的积累，对于科技创新、经济发展具有重要的战略意义，科学数据共享是社会发展的必然需求。国家自然科学基金委员会“中国西部环境与生态科学数据中心”（简称西部数据中心）面向“中国西部环境与生态科学计划”及广大科研工作者展开科学数据服务，并已取得显著的服务成效。数据中心采取的多层次的共享政策及主动、专业、专职的服务小组是数据共享服务顺利进行的重要保障。数据发布方、数据作者与用户三方交流机制的建立及面向科学研究的数据服务是进一步发展的方向。同时，数据共享机制不健全、国家层面的共享环境没有形成是目前阻碍数据共享服务发展的瓶颈。

英文摘要：

Scientific data is the accumulation of the achievements in scientific research, which plays an indispensable role in technological innovation and economic development in a long run. Scientific data sharing is an inevitable demand of social development. ＂Environment and Ecological Science Data Center for Western China＂, sponsored by the National Natural Science Foundation of China （NSFC）, provides scientific data service for the NSFC＇S ＂Environment and Ecological Science Program＂ and the majority of researchers, and dramatic accomplishments had been achieved. Multilevel sharing policy and active, professional and qualified staffs are the guarantee of the successful data sharing. The further striving goals in the next step are to build the communication network among data publishers, data owners and data users, and to develop data service facing concrete scientific research. Meanwhile, the lack of perfect data sharing mechanism and circumstances in the national level is the bottleneck to impede the development of data sharing service.