According to the order of “combing functional requirements, proposing layout optimization and determining investment strategy”, this topic evaluates the requirements of digital infrastructure for information management and automatic control of new power system, proposes layout optimization strategy of digital infrastructure in multiple scenarios, evaluates the supporting capacity and scale of computing power service required by each computing unit in new power system, analyzes the optimal investment strategy of digital infrastructure of power grid enterprises, and solves the corresponding problems by establishing corresponding models. The solutions proposed in this topic give specific ideas for guiding new power system to adapt to the actual needs of realistic scenarios, as follows: The modernization transformation and digital construction of power system have made certain contributions.