Abstract:This article presents an wisdom economic zone’s main and distribution network planning method about investment budget, accounting and analysis and evaluation based on big data to solve the cost index too much and difference, difficult to estimate status. The method is using big data technology to count wisdom economic zone project historical grid investment data, budget for the main network and distribution network through different strategies. This method combines with the "Internet " technology at the same time, during the construction process, it can find cost overruns, schedule behind or other issues then give an early warning and analysis specific causes of cost, and provide a scientific and reliable basis for grid construction project cost forecasting and cost real-time monitoring.