The invention relates to a building, in particular to a logistics system for a building. The logistics system comprises a spiral staircase; a horizontal rest platform is arranged on the spiral staircase; a handrail corresponding to the staircase is arranged on the staircase and adopts a hollow tubular structure; a cavity inside the handrail is a slide; the handrail of the staircase comprises a flat and straight section corresponding to the rest platform; an upper opening and a lower opening are formed in the flat and straight section; and opening and closing doors are hinged to the edge of the upper opening and the edge of the lower opening. A receiving box is arranged on the rest platform and is located below the flat and straight section; a long inner cavity is formed in the receiving box; and a buffer device is arranged in the inner cavity. Objects are landed safely by the aid of the buffer device inside the receiving box; and through arrangement of the system, the problems about logistics of small objects among floors of the building at present are solved, and convenience is provided for residents living on the floors.