A device for assembly and disassembly comprising: a support assembly, wherein the support assembly comprises a first support member and a locking assembly, the locking assembly comprises a locking driver and a locking connection structure, the locking driver is connected with the first support member, the locking connection structure is connected with the locking driver, the locking connection structure is configured to support a negative pressure assembly, and connection between the locking connection structure and the negative pressure assembly is separable; a bearing assembly, wherein the bearing assembly comprises a bearing member for carrying a tray, the bearing member is positioned below the first support member, at least one of the bearing member and the first support member is raised and lowered in a first direction; and characterised by further comprising: a latching assembly, wherein the latching assembly comprises a first connection structure configured to connect with the negative pressure assembly, a second connection structure configured to connect with the tray, and a movable connection structure movably connected with the first connection structure; the first connection structure is latched with the second connection structure through the movable connection structure, and the movable connection structure is unlatchable from the second connection structure; wherein under actuation of the locking driver, the locking connection structure is movable in a second direction, and the locking connection structure drives the movable connection structure to move in the second direction, and the movable connection structure is separable from the locking connection structure; wherein the locking connection structure is separated from the negative pressure assembly while the movable connection structure is latched with the second connection structure, or the locking connection structure is connected to the negative pressure assembly while the movable connection structure is unlatched from the second connection structure. a support assembly, wherein the support assembly comprises a first support member and a locking assembly, the locking assembly comprises a locking driver and a locking connection structure, the locking driver is connected with the first support member, the locking connection structure is connected with the locking driver, the locking connection structure is configured to support a negative pressure assembly, and connection between the locking connection structure and the negative pressure assembly is separable; a bearing assembly, wherein the bearing assembly comprises a bearing member for carrying a tray, the bearing member is positioned below the first support member, at least one of the bearing member and the first support member is raised and lowered in a first direction; and characterised by further comprising: a latching assembly, wherein the latching assembly comprises a first connection structure configured to connect with the negative pressure assembly, a second connection structure configured to connect with the tray, and a movable connection structure movably connected with the first connection structure; the first connection structure is latched with the second connection structure through the movable connection structure, and the movable connection structure is unlatchable from the second connection structure; wherein under actuation of the locking driver, the locking connection structure is movable in a second direction, and the locking connection structure drives the movable connection structure to move in the second direction, and the movable connection structure is separable from the locking connection structure; wherein the locking connection structure is separated from the negative pressure assembly while the movable connection structure is latched with the second connection structure, or the locking connection structure is connected to the negative pressure assembly while the movable connection structure is unlatched from the second connection structure. a latching assembly, wherein the latching assembly comprises a first connection structure configured to connect with the negative pressure assembly, a second connection structure configured to connect with the tray, and a movable connection structure movably connected with the first connection structure; the first connection structure is latched with the second connection structure through the movable connection structure, and the movable connection structure is unlatchable from the second connection structure; wherein under actuation of the locking driver, the locking connection structure is movable in a second direction, and the locking connection structure drives the movable connection structure to move in the second direction, and the movable connection structure is separable from the locking connection structure; wherein the locking connection structure is separated from the negative pressure assembly while the movable connection structure is latched with the second connection structure, or the locking connection structure is connected to the negative pressure assembly while the movable connection structure is unlatched from the second connection structure.