The construction of smart grid can not bring too much influence on people's daily electricity consumption. As a power sector, it should also control the cost problem in the construction process. Only by saving the cost of production, transmission and allocation of electric energy can we lower the cost and price of electric energy from the source and truly make it beneficial to the people. In the process of construction, we should not only pay attention to the operation quality of smart grid, but also pay attention to its economic benefits