The digitization of ancient books began in America, accompanied by advanced computer technology. At the end of 1970s, and RLIN successively launched Zhu University chapters and sentences index, Wang Yangming biography index, Dai Zhenyuan rare edition index and other databases. It was not until 1980s that China, Taiwan Province Province, Hongkong and mainland China began to digitize China ancient books. Since 1980s, the digitalization of ancient books has begun to appear in Chinese mainland, but there are few researches and achievements. Until the 1990s, with the popularization of computers and the intervention of network technology in China, the embryonic form of digitalization of ancient books was formed. Since the mid-1990s, the National Library has made a huge digitization plan for special collections of ancient books, such as stone tablets and anvils, Xixia broken gold, Dunhuang treasures, digital local chronicles, and Oracle Bone Inscriptions and Yongle ceremonies. Peking University's "China Basic Ancient Books CD Library" plans to collect 10000 kinds of ancient books. Dizhi Culture Publishing Co., Ltd. and Shanghai People's Publishing House launched the full-text retrieval version of Sikuquanshu. Shutongwen Digital Technology Co., Ltd. launched four series of full-text retrieval versions. Sinology Company has launched a series of products such as Anthology of Sinology. By the end of 2004, there were about 70 China ancient books databases on the Internet. The CALIS project sponsored by Peking University and the ancient books sub-project of Nanjing University Library Canal Project have achieved initial results.