The inspection of relay protection is an important means of preventing power grid or power supply accidents. Currently only scraps of auxiliary software is used in inspection fieldwork that mainly relies on manual operation and individual experience without an effective fully-controlled technical support platform. The relay protection inspection standardized operation expert system developed by Jiangsu Electric Power Company using information and network technology is capable of providing effective solutions. Through integrated design of the platform and structuring， the integration of standardization， intelligent operation， automation of relay protection inspection operation throughout Jiangsu Province is realized. Application in actual inspection shows the improvement on the safety， quality， efficiency and information-based management.