This is a three-in-one piece of custom-made built-in furniture that combines a folding bed, an open bookshelf and a wardrobe — a smart centrepiece for any home renovation. The spacing of the bookcases can be freely selected. The thickness of all boards is unified at 25mm to enhance the stress and support of the bed frame. The size of the folding bed can be customized at will, and it can be made into a regular 4-foot bed or an extended 6-foot bed. Sofas of different colors can be matched in front of the folding bed to create a space that is unified with the stairs. On the left side of the folding bed is a single-door storage wardrobe. The compartments in the wardrobe can be selected at will, with pull baskets, pull mirrors, shirt ironing boards, etc. Our transforming bed is made of high-grade hardware materials and descends slowly, making it easy for even children to operate. When folded, it becomes a sofa and when folded, it becomes a bed, creating a multifunctional activity space.