Both the National Northwest Library and Mr. Liu Kwoh-Chuin's thoughts on library science are monumental achievements in the development history of Chinese libraries. At the academic seminar commemorating the 80th anniversary of the establishment of the National Northwest Library and the 125th anniversary of the birth of Mr. Liu Kwoh-Chuin, participating experts and scholars conducted in-depth discussions on the establishment and operation practice of the National Northwest Library, the connotation and exploration of Liu Kwoh-Chuin's thoughts on library science, as well as the contemporary inheritance of the spirit of the National Northwest Library and its librarians. The librarian system, business system, and collection system formed during the establishment and operation practice of the National Northwest Library, Liu Kwoh-Chuin's emphasis on social education, reference and consultation services, local documents, and the professional qualities of librarians in his thoughts on library science, as well as the patriotic spirit of arduous struggle and protecting culture to save the nation, the professional spirit of seeking truth and being pragmatic, scientific and rigorous, and the service spirit of popularizing education, enlightening wisdom, providing advice to the government, and promoting culture demonstrated by the group of librarians of the National Northwest Library, all deserve to be inherited and developed by contemporary libraries.