The old museum, from hardware facilities to software supporting facilities, is seriously lagging behind the rapid development of the information age, so it is urgent to transform and update. The designer removed the original illegal parts and facade decorative elements, leaving only the original structure and part of the wall. Based on the orthogonal grid formed by the columns and floors, the street-facing facade of the north building introduces four interlocking volumes that reshape the richness and expressiveness of the building. The two diagonal volumes have transparent glass curtain walls, narrowing the distance between the library and the public, showing the open and friendly temperament.