Volume control methods and control devices, and multimedia playback control methods and control devices are provided. The volume control method comprises: acquiring volume information of a first device; in response to that the acquired volume information of the first device satisfies a predetermined condition, determining at least one second device; and controlling volume of the at least one second device. When a user goes away from a multimedia playback device, multimedia playback of another device can be controlled, to cause that multimedia playback that the user watches/listens to is not affected obviously.