During the 70 years of her reign，Elizabeth II maintained the bond between the British royal family and the common people，became an important spiritual link for the survival of the Commonwealth，and maintained the relative stability of the British monarchy. Queen Elizabeth’s death has left a huge vacuum for the British royal family. Her successor，King Charles III，is far less popular than his mother，and his personal image has been affected by his divorce from Diana. Opinion polls show that support for the monarchy among the younger generation has dropped markedly since Charles III’s accession. Unlike Queen Elizabeth II，who insisted on “monarchical neutrality”，Prince Charles has shown greater enthusiasm for public issues and has invested more in public welfare，such as environmental protection，which could bring positive changes to the royal family or could cause the royal family to become embroiled in political controversies. King Charles III has his own reform agenda for the monarchy，and tries to create a more “modern” British monarchy by narrowing the scope of the royal family. On the one hand，this will to some extent reduce expenses and public activities. On the other hand，a slimmed-down monarchy will also reduce the risk of crisis brought by personal scandals of royal family members. These reforms run counter to Queen Elizabeth II’s practice of retaining all members of the royal family to maintain royal influence. Therefore，it remains to be seen whether they will succeed and continue the influence of the British royal family in public and political life. In addition，Charles III will face the major challenge of redefining a more modern relationship between the British king and the Commonwealth. As the spiritual bond that holds the Commonwealth countries together，the British royal family still has an important mission to ensure the stability of this system.