CC BY 4.0Pun, Priscilla Nga Ian2022-09-092022-09-092022-09-092022-09-09https://2022.ifla.org/https://repository.ifla.org/handle/20.500.14598/2065The purpose of the alliance is usually to share resources and expertise, drive innovation and cultivate creativity, increase capabilities and scale, and so on. It helps libraries to improve resilience and sustainability especially in the times of public health, economic and climate crises. During the pandemic, the connection and experience sharing among libraries in responses to the Covid-19 was significant and helpful. It guided libraries with the most effective way to manage the pandemic crisis. Library alliances and associations at various levels have played an important role in it. Macao Special Administrative Region aims at building into a world-class tourism and leisure centre, as well as a commerce and trade cooperation service platform between China and Lusophone countries. A number of important library alliances had been established in Macao during the recent years. All of these alliances intend to enhance the regional and global communication and cooperation. Open science is emerging and essential in higher education and scientific research. It broadens the dissemination and engagement in science, as well as emphasizes on openness and sustainable development of scholarship. To promote open science with alliances is of critical value in libraries and for library sustainability.enhttps://creativecommons.org/licenses/by/4.0/Subject::SustainabilitySubject::Library associationsSubject::Open scienceSubject::Academic and research librariesArticlesPriscilla Nga Ian Pun