Abstract: This paper mainly analyses the year and subject distribution，requesting unit and subject distribution，document type and subject distribution，subject keyword statistics of document delivery content of Jiangsu Engineering Technology Literature Information Center platform，and further understands the subject service needs of information users.And investigates the subject services provided by the co-construction units of Jiangsu Engineering Technology Literature Information Center，such as Jiangsu Institute of Science and Technology Information，Jiangsu Institute of Agricultural Sciences，Jiangsu Institute of Technology Supervision and Information，Nanjing Library，Nanjing University Library，Southeast University Library，Nanjing Agricultural University Library，China Pharmaceutical University Library，Nanjing Medical University Library，etc.Then combines the subject analysis of document demand of Jiangsu Engineering Technology Literature Information Center with the present situation of subject service of the co-construction units，and explores the new direction of subject service of university library by integrating scientific research，assisting teaching，building platform，supporting decision-making and staffing subject librarians and so on.

Key words: Jiangsu Engineering Technology Literature Information Center；University Library；Subject Service