In the title retrieval system of Shandong University of Technology Library, the maximum time limit of "new book notification" is two weeks. Official website of Shandong University of Technology shows that the longest time is two weeks, mainly for the convenience of readers to know the latest book resources purchased by the library in time and improve the utilization rate of books. Through the "new book notification" system, readers can know the new books in the library as soon as they are put on the shelves, so as to find the books they need more quickly.