The distribution network equipments are complicated and various and easily subjected to various interferences in nature. The intelligent distribution network has just started, so it has some insufficient in disaster monitoring, operation management and fault diagnosis. The communication technology for distribution network protection based on sensor network is investigated, in order to realize the online monitoring and early warning of power network disaster. Through the nodes array arrangement of multi-task sensor and the architecture classification of network system, the distribution network could be comprehensively monitored by using graphic and visualization. Finally, a visualization monitoring and data management system is presented for power network in this paper, which could implement data retrieval, statistics, calculation and treatment, generate secondary various data, as well as be useful for the analysis and decision making of the grid operation state and trend.