The invention discloses a configuration on-line display method based on time series data and belongs to the technical field of dispatching automation of an electric power system. The method includes that a configuration graph is drawn in a configuration tool through an API and a model tool of an electric power system real-time database at C/S clients, a data transmission module is used for shielding specific operations of a bottom layer relation database, performing serialization on the configuration graph and transmitting into a relation database which is used by an enterprise portal in a binary system stream mode, a binary system stream is taken out by a configuration graph display plug-in and analyzed to be the already drawn configuration graph, the configuration graph is displayed in hypertext markup language (Html) of the enterprise portal in an on-line mode, finally, communication between on-line displayed configuration graph and the real-time database is performed through remote transmission services, and on-line display of real-time data and trend analyses of historical data are achieved. By means of the configuration on-line display method based on the time series data, interaction of the configuration tool with the on-spot enterprise portal is achieved, and application value of the configuration tool in a power sector can be effectively improved.