The utility model discloses a system for monitoring the comprehensive state of power grid equipment. The system comprises a transformer monitoring unit used for monitoring the working state of transformers, a line monitoring unit used for monitoring the state of power transmission lines, a wireless reception unit, a center processing unit, and a data monitoring unit. The transformer monitoring unit and the center processing unit are connected. The line monitoring unit and the center processing unit are connected. The center processing unit and the data monitoring unit are connected in a wired and/or wireless mode. The wireless reception unit and the center processing unit are connected electrically. The transformer monitoring unit comprises an oil chromatogram monitoring device, a GIS (Gas Insulated Switchgear) monitoring device, and a lightning arrester monitoring device which are all connected with the center processing unit. The line monitoring unit comprises a distributed fiber temperature sensor, a high-frequency current sensor, a line handling device, and a wireless transmission unit. The fiber temperature sensor and the high-frequency current sensor are connected with the line handling device electrically. The wireless transmission unit and the line handling device are connected electrically. The system is capable of monitoring the power grid equipment of transformer substations in a real-time and comprehensive manner and feeding information of all the transformer substations back to a scheduling center accurately and timely.