Provided is a method and system for providing cloud based user interface (UIs) that may store video content and a UI resource in a storage separate from a server, and may control the video content and the UI resource to be synthesized at a subscriber terminal device, thereby significantly decreasing load of a UIs providing server. The method and system for providing cloud based UIs may provide consistent UIs to various set-top boxes and media devices and may easily perform a change and a test of UIs.