An unpacking method, an unpacking device and an unpacking system of a packed frame are disclosed. The packed frame is to be displayed on a screen and includes a color frame and a resized depth frame, and the color frame is corresponding to the resized depth frame. The center of the color frame is displayed in the central area of the screen. The unpacking method includes the steps of: extracting the color frame and the resized depth frame from the packed frame; and restoring the resized depth frame to obtain an original depth frame.