Virtual network control method and system based on fluctuations

Disclosed is a virtual network control method for adaptively controlling the topology of a virtual network formed on a physical network, in response to environmental changes in the virtual network. The virtual network control method is provided with: a storage step for storing the Langevin equation, which models the dynamics of the topology of the virtual network as variables for controlling the number of wavelength paths on the physical network, as a fluctuation equation; a design step for designing control parameters included in the fluctuation equation; and a control step for controlling the topology of the virtual network by applying the control parameters to the fluctuation equation to change order parameters included in the fluctuation equation when environmental changes occur in the virtual network, and by transitioning the solution of the fluctuation equation between attractors determined by the deterministic terms of the fluctuation equation in accordance with the effects of fluctuation terms of the fluctuation equation.