2020年席捲社交平台的社會運動Black Lives Matter（BLM）促使博物館正視其落實社會正義的社會角色與責任，而由於新冠疫情的影響，世界各地博物館多處於閉館狀態，社交平台則成為博物館與民眾對話的主要平台，也因此博物館在社交平台上的作為成為社會大眾檢視的主要重點。本文從博物館社會角色的轉變為始，強調博物館與社會連結的重要性與必要性。並接著探討社交平台於博物館場域中的應用，如希望增加實際參觀人數的展示宣傳、提升博物館收益的數位行銷以及保持與博物館觀眾連結的社群營造等。也因為社交平台的普及性，政治議題得以迅速引起社會大眾的注意力以及討論，而社交平台也提供民眾更直接的對話平台，讓要求博物館省思機構實踐社會責任以及館方對於議題的工作策略方案變得更加容易。本文最後以檢視不同博物館對於BLM議題的作為，指出雖然博物館多宣稱提倡多元與包容的社會價值，然而為了形成有意義的改變，博物館的社會責任不能僅止步於立場的宣稱，而必須做出實際作為，如促進多方且開放的對話與提升管理階層的多元性等。

Since the social movement, Black Lives Matter (BLM), had taken over social media in 2020, museums are urged to examine their social responsibilities and practice social justice. Due to the influence of COVID-19, museums worldwide mostly remained closed to the public, and social media has become the primary channel to connect and interact with the audience. This article begins by addressing the shift of museums' social roles and emphasizes that it is crucial and necessary for museums to reexamine their social responsibilities and connect with society more than they used to. The article explores the application of social media in museums, including promoting exhibitions to bring more visitors in, increasing profit from digital marketing, and connecting and interacting with the audience to build a close community. Because of its high accessibility, social media also gives the public a much direct platform to require museums to reflect their strategies on practising social justice. Lastly, this article looks into how different museums responded to BLM. Although museums claim to stand with diversity and equality, to make meaningful changes, museums need to turn their online statement into actions, such as encouraging open and diverse conversations and improving the diversity among museum management staff.