A canopy assembly has at least one canopy device, at least one guiding cable, at least one connection device, and a driving device. The at least one canopy device is expandable along an expansion direction. Each of the at least one canopy device has a canopy element and multiple clamping members including a first canopy clamping member. The at least one guiding cable is disposed above the at least one canopy device and extends along the expansion direction. The at least one connection device is connected respectively with the at least one canopy device and is mounted moveably on the at least one guiding cable. The driving force is connected with the at least one connection device to drive the at least one canopy device to expand along the expansion direction.