By means of network big data tools like Baidu Index and Google Trends as well as a bootstrap-based improved gray mean value generation method,this paper makes an analysis of big data of"Digital Library"from 2011 to 2017,compared with big data of"electronic library",focusing on the distribution of network searchers’ age and area, news detection, hot words, network searching frequency, etc. It proposes that libraries should make better use of mobile platforms,attach more importance to the publicity of digital library service,and try to change people’s stereotype impressions of digital library.