中文摘要：

目前，图书馆纷纷开展数据服务，作为一种新的服务形式，数据服务与图书馆传统的服务方式有很大不同。数据质量是数据服务的关键，因而建立数据质量影响因素模型有助于提高数据服务质量。数据有自身的生命周期，基于生命周期理论可以构建相对完善的数据质量影响因素模型，该模型有助于图书馆提高数据质量，改善数据服务。

英文摘要：

More and more libraries have begun to offer data service presently, which, as a new service, is quite different from the library traditional services. Data quality is the key factor of data service; therefore, establishing an data quality should be helpful to improve the quality of data service. Data has its own life cycle, base on can be built to improve data quality and data service.