The integration of large-scale wind power in East China grid is described.The method of transmission network value planning considering large-scale wind power is successively proposed.Based on a thorough investigation on the life cycle cost and financial benefits of transmission network，a mathematical model for value planning is developed with maximum revenue as the objective while taking into account the planning cost and the benefit at the same time.The environmental benefit arising from large-scale wind power integration is also calculated.Case study results have verified the validity of the value planning model.It is shown that the value planning has guiding significance evidently for actual network planning and the high environmental benefit is in keeping with the national strategy for sustainable development.