Embodiments of the invention provide a Web application updating method, apparatus and system. The method comprises the steps of receiving a resource updating file for an independent display layer in a Web application, wherein the display layer contains a resource file, the resource file has loading time, and the resource updating file has modification time; judging whether the modification time is greater than or equal to previous loading time; and if yes, loading the resource updating file in the display layer. According to the embodiments of the invention, the display layer is independently managed, and when the display layer is updated, the resource updating file can be modified and released directly in the display layer, the updating of back-end codes does not need to be concerned and the complicated conventional release processes of code combination, compilation, packaging and the like are not required, so that the release processes are greatly reduced, the release time is shortened, the updating risk is lowered, the stability of the display layer is improved, and the updating efficiency is greatly improved.