To explore the design strategy of public facilities in commercial space. The great development of social economy has brought about the upgrading and transformation of all walks of life, and also driven people's demands in all aspects. Under such a background, commercial space public facilities are undergoing their own transformation. In order to find more suitable for people of the various requirements and meet the requirements of the development of the design strategy and methods, this paper would be commercial space as a breakthrough point, from the value and function of the public facilities, the content and form of the urban public facilities were combed first, and the value of its existence was analysed. Then combined with the actual demand of commercial space, it was explored from the aesthetic perspective, functional perspective and sustainable perspective, and various effective design strategies were tried. The effective use of public facilities in commercial space design can highlight the environmental characteristics of the space to a greater extent, so that the original rigid commercial space can achieve an artistic effect of harmonious space under the enhancement of beauty and function and the help of the sustainable concept, thus better meet the various demands of the public.