In the process of social digital transformation, the importance of library space element is becoming more and more prominent, but there are still many problems to be solved in its space value cognition and governance. This paper puts forward the concepts of library’s holistic space view, integrated space view and convergent space view, focuses on improving the value of library space, and embodies the space value of library into public cultural space, trusted service space, public creative space, public humanistic space and public living space. In the process of social digital transformation, it is necessary to fully protect the traditional value of library space, improve the digital intelligence level of library space, expand the boundary of library space, promote the sharing of library space, and enhance the sustainable development ability of library space.