1. A user interface (UI) rendering and operating method to be implemented by a processor with a deployment file, the deployment file including data associated with a parent procedure, the method comprising the steps which correspond to the parent procedure of: (A) parsing the deployment file so as to obtain UI rendering data that defines a visual design of the UI (B) parsing the deployment file so as to obtain feature provider data that defines a procedure providing a feature which is linked to an element of the UI, feature identification data that defines an identification (ID) corresponding to the feature, and element rendering data that defines a visual design of the element; (C) generating the element; (D) binding the feature provider data and the feature identification data to the element; (E) rendering the UI with reference to the UI rendering data; and (F) rendering the element in the UI with reference to the element rendering data.