Under the new situation of power grid development and new requirements of With the development of power dispatching automation systems of smart grid, it is necessary to build an unified city and county dispatching automation system featured as being pragmatic and technologically advanced. Based on the analysis on management and construction mode of several city and county dispatching automation systems, and combined with the actual situation of power grid system in Jiangsu province, a scientific, reasonable and effective construction scheme for city & county integration dispatching automation system was proposed, which contributed to the reform of city & county dispatching management system.