According to the demand of gas schedule management in the steel plant, Kirchhoff law in the power grid is used to build virtual network model for gas pipe network. Applying Newton-lafusen method, by solving nonlinear equations, the gas flow and pressure drop on the measurement points in the network are calculated. These data are compared with the real-time data in the database to monitor the operation status of entire network. When the production plans are changed, the schedule instruction are input to simulation calculation module. By analysing the operation status of entire network, after forecast instructions are issued, to adjust the forecast scheduling instructions.