The invention discloses a meter reading system of a network power grid. The meter reading system comprises a meter reading scanner, an image analysis module, a data processing module, a zigbee gateway, a network database and an error alarming module, wherein the meter reading scanner, the image analysis module, the data processing module, the zigbee gateway and the network database are connected in sequence; the error alarming module is connected with the meter reading scanner and the image analysis module; the meter reading scanner is used for reading an image an electric meter display window; the image analysis module is used for analyzing the image shot by the meter reading scanner and converting the image information into digital information. The meter reading system has the beneficial effects that the advantages of manual meter reading and remote meter reading are integrated, namely due to on-site operation of the meter reading scanner, the meter reading data are remotely transmitted to the network database through the zigbee gateway, so that concentrative management of the data is realized, and an independent system architecture is not needed. The meter reading system is high in meter reading accuracy and high in meter reading speed.