A vacuum device includes a main body and an adjustment assembly connected to the main body. The main body includes a frame, a loading member, and an elastic film. The loading member and the elastic film are arranged at opposite end surfaces of the frame. A chamber is cooperatively formed by the frame, the loading member, and the elastic film. The adjustment assembly adjusts the inner air pressure of the chamber. The loading member includes an absorption area connecting the chamber to outside the main body. The absorption area changes the air pressure inside the chamber. Also provided is a bonding apparatus using the vacuum device.