To solve the problem of power system data coming from multiple sources, huge amount of on-site operation and maintenance workload and high manual verification error rate, a fuzzy matching technique is introduced, which fuzzy matching variety sources of data as a reference value for comparison. Regular inspection value is compared with reference value, inspection information is automatically sorted and intelligently analyzed. A variety of inspection reports are produced and displayed by Web. This technique has been successfully applied in Guangdong Power Grid with the characteristics of fast matching speed, high accuracy and low confusion rate. It can effectively replace the regular, daily and annual inspection of operation and maintenance personnel to power grid safety and stability devices, which can reduce human participation, workload of manual verification and error rate and improve work efficiency.