A application-program processing method is provided. The method includes obtaining a sub-application identifier by using a parent application running in an operating system, obtaining a corresponding sub-application page configuration file according to the sub-application identifier, and obtaining a common-component identifier from the sub-application page configuration file. The method also includes selecting a common-component corresponding to the common-component identifier from a common-component library provided by the parent application, and generating a sub-application page according to the selected common-component.