Abstract: To meet the latest requirements of power grid development, the "Code of condition-based maintenance & test for electric equipment" published in 2010 has been substantially revised. In this revised edition the application of new technology was strengthened, and a more complete condition analysis method was reconstructed. In this paper, the newly introduced intelligent inspection, live detection, outage tests and condition analysis methods were analyzed, and the principles, applicable scenarios and application conditions of the new technologies were described in detail. Such items as the frequency domain dielectric spectrum for analyzing the degree of moisture of oil paper insulation, the frequency sweep short-circuit impedance for evaluating the degree of transformer winding deformation, the dynamic circuit resistance for detecting contact burning of circuit breaker, on-site X-ray detection for detecting mechanical defects in GIS and line fittings and so on were emphatically introduced. In addition, the condition analysis methods, including analysis based on single parameter and comprehensive analysis based on multi-parameter, were deeply analyzed, the theoretical basis of each condition analysis method was expounded, and the concept of associated condition indicators was further explained in detail and some application cases were given.