This paper summarizes several aspects of energized test methods

pattern recognition of defect types and partial discharge source localization and live testing work management

and reviews these important research results and progress in recent years. Then the paper discusses the limitations of art energized test technology

severity assessment methodology of partial discharge source

the detection and analysis of different types of partial discharge voltage applied

the charging detection mode of development

information technology for live testing work. And the paper analyzes the problem in research and application of energized test based on condition-based maintenance system and possible directions for future research and applications. The possible development direction in future research and application are proposed.