In the context of promoting clean energy and hydropower consumption，the development status of condition based maintenanc and charged detection in Sichuan is described combined with the uniqueness of Sichuan power grid． The problems in equipment condition evaluation are also pointed out． According to the achievements of charged detection in last three years， the suggestions of promotion strategy are proposed for condition based maintenanc through the analysis of the defects characteristic relation between defects and terrain，load，lightning stroke，operation life and equipment type． These suggestions include data application，maintenance，inspection，design purchase and equipment maintenance operation．