In the new security pattern，the power grid safety management was promoted to transform from the traditional mode to the digital，information，and intelligent mode during the life-cycle of safety production. Based on patent data of China's power grid intelligent security from 2008 to 2023，the patent map was performed using network centrality analysis and main path analysis. Then，key patent technology subgroups were obtained to systematically analyze technological development and key points of power grid intelligent safety. Based on patent maps and expert opinions，the entropy weight-TOPSIS method was used to evaluate the support of China's existing intelligent safety technology community for power grid security and intelligence. The results showed there were 11 key technology communities for the power grid intelligent safety technology，and power grid intelligent safety process technology was the most excellent knowledge group. Among the 11 types of power grid intelligent safety technology communities，technologies including intelligent control，intelligent dispatching，and network communication safety were with higher support for power grid intelligent safety. Intelligent security technology can well support the safety control and stability capabilities in the traditional safety goals of the power grid. Furthermore，it supports the safety governance and active security capabilities in the modern safety goal of the power grid. However，the support for security resilience capabilities was insufficient.