The present disclosure relates to systems and methods for updating and loading an application installed in a terminal device. The system may perform the methods to transmit an update notice of the application to the mobile device; and provide a resource installation package to the mobile device upon a response from the mobile device to the update notice. The application includes a shell and a pre-update plugin, and the shell includes a plugin engine. The resource installation package is configured to direct the application to use the plugin engine in the shell to utilize components of the resource installation package to update the pre-update plugin without attaining approval from an application store platform.