The invention relates to the technical field of grid load analysis, and specifically relates to a load measurement and analysis method based on marketing, power distribution and dispatching integration. The load measurement and analysis method comprises the steps of (1) reading equipment parameter information of a line through a dispatching and commanding management information system, reading equipment state data and measured data of the line through a grid energy management system, and reading power data of equipment on the line through a grid energy acquisition system; (2) extracting the information acquired in the first step by a data acquisition and monitoring control system at regular times, calculating the capacity-load ratio and the load rate of a transformer, the load rate of the line and the grid voltage operation level according to the measured data acquired by the grid energy management system, and thus acquiring the online grid loss; and (3) comparing the calculation result with loss data recorded in a grid marketing database so as to judge whether there is an abnormal power utilization condition or not. The load measurement and analysis method can continuously track load operation conditions of the transmission line and the transformer, and realizes online calculation for the grid loss, thereby providing an effective data source for the management staff.