Abstract: Live detection is an important basis for assessment of condition based maintenance for power transmission and transformation equipment, through the analysis of the application status of charged detection and on-line monitoring technology in Inner Mongolia power grid, corresponding to the defects of the equipment, it can be used to test and evaluate the current condition and the current state of the test.On the basis of this, design and develop a set of standardized management modular of the live detection data information.From the point of view of technology and management, the process of monitoring and evaluation is unified, including the main transformer and the on-line monitoring data.