The historical Documents Seminar of Zhejiang Provincial Public Libraries in 2009 was held from October 29 to 30, 2009 at Pinghu City Library. The seminar was hosted by Zhejiang Library(Ancient Books Protection Center of Zhejiang Province) , assisted by Jiaxing City Library and organized by Pinghu City Library. The leaders attending the seminar include: Zhang Zhiqing, deputy librarian of the National Library of China, Dai Yan, chief of Social Cultural Division of Zhejiang Culture Department, Zhu Haimin, chief librarian of Zhejiang Library ,Gu Yufeng, deputy mayor of the Pinghu City, Jia Xiaodong, deputy librarian of Zhejiang Library, Zhang Yingjie, deputy director of Culture Bureau of Jiaxing City, Shen Lixing and Liu Jing, respectively the director and deputy director of Sports and Culture Bureau of Pinghu City, Zhang Mingli, chief librarian of Jiaxing City Library and so on. Sixty six historical documents workers coming from 38 units took part in this seminar, and ten of twenty received papers were read. At last Zhang Zhiqing gave a special report about protection of ancient books.