The Qing dynasty brocade box is also called the sac box. The sac box, also known as the brocade box, brocade box, is a broad word, covering a wide range, people usually put soft, hard surface, soft sac, hard sac of the sac box as well as the book cover, painting box, brocade cover and so on collectively referred to as the sac box. According to the historical data of brocade, it is inferred that the production of our country has a long history of the sac box. From the Ming and Qing dynasties produced brocade varieties, box brocade has been one of the three varieties (heavy brocade, fine brocade, box brocade). Can be seen at that time the box industry in all parts of the greater development. The production of the capsule box using natural materials, the framework of the box by the multi-layer straw cardboard, cardboard is both load-bearing structure, but also the enclosure structure. Box outside by the brocade, satin, cotton to decorate, box box box with cardboard, cotton, silk, rich spring spinning for the bag. Many cultural relics bag box is a soft bag or hard bag double box structure form, so that the overall strength of the bag box is higher, can withstand the impact of external forces and extrusion, but also to facilitate transportation and storage. The production of the bag box is a handicraft, with scientific and practical. At present, the design and production of the capsule box is still one of the important methods of protection of cultural relics in China.