Abstract: A method and a device for saving storage space of a terminal device are provided. The method may include: determining an application to be backed up in applications installed locally; sending an installation package and data relating to the application determined to a server for back-up; and uninstalling locally the application and reserving an icon of the application. The terminal device may include: a determination module, a backup module and an uninstall module. The terminal device and method in the present disclosure may have the advantages of effectively saving storage space, avoiding the application from occupying storage space for a long time, and reducing waste of storage space.