With the rapid development of digital modeling technology, architectural design no longer merely remains at the stage of drawing, but provides immersive spatial experiences for designers and clients through realistic 3D modeling. The 3D model diagram presented in this article shows the fine design and construction logic of a modern public space. The overall space adopts a floor-to-ceiling glass curtain wall design, introducing a large amount of natural light to make the space brighter and more transparent. The exposed design of concrete and metal structures presents an industrial style, enhancing the modernity of the building. A series of spiral staircases and elevator shafts are set in the center, forming a clear vertical traffic flow line. On the left is the multi-level reading or office area, and on the right are individual workstations or exhibition display stands. The large area of glass walls combined with wooden floors, under the reflection of natural light, enhance the warmth and affinity of the space. The staggered arrangement of stairs from the ground floor to the top floor enhances the dynamic rhythm of the visual effect and also facilitates the rational distribution of the flow of people. The combination of concrete, metal, elevator tracks and glass forms a design language that integrates modernity and industry.