Abstract: The present invention involves umbrella devices and methods for dual-function umbrellas that may combine a vertical-supported and inclined-suspended umbrella in one structure. A dual-function umbrella that may have vertical supporting and incline suspending structure may have a frame column, umbrella holder and a crank mechanism to position the umbrella holder; the umbrella holder may include a fixed umbrella bracket, moveable umbrella bracket, multiple umbrella ribs with one end pin-jointed to the fixed umbrella bracket, and multiple supporting ribs with opposite ends pin-jointed to the central part of a corresponding umbrella rib and the moveable umbrella bracket. The dual-function umbrella may also have a tilting bar and a cross bar wherein the frame column may be equipped with a moveable locking gear for locking the bottom end of the cross bar. The crank mechanism may be positioned at the cross bar bottom end.