The present invention describes a method and system for governing a physical device or application service in a real world through a virtual device in a virtual world. The physical device or application service registers at least one virtual adaptor of the physical device or application service to a virtual device broker. A user creates or composes the virtual device with the at least one virtual adaptor in the virtual device broker. The user commands to the virtual device through a user interface of the virtual device. The at least one virtual adaptor in the virtual device translates the command to a controlling signal to the physical device or application service. The controlling signal operates the physical device or application service according to the command to the virtual device.