Embodiments of the present application relate to a method, device, and system for network control. The method includes determining, by one or more processors, whether a target application is running in a foreground of a terminal, the target application being included in a set of target applications, and in response to determining that the target application is running in the foreground, blocking or throttling, by the one or more processors, network communication for at least one application not included in the set of target applications.