The invention provides a power metering system equipped with a monitoring component, comprising electric energy meters and a power acquisition device. The power acquisition device is internally equipped with a motherboard, and a power board, a control board and an expansion plug board are sequentially plugged onto the motherboard. The control board is equipped with an acquisition chip, a control chip, a memory chip, a communication chip and a monitoring component, all of which can be connected through mutual communication. The acquisition chip is connected with the output ends of the electric energy meters through data lines. By adopting the system, metered power quantity of the electric energy meters of different electricity prices in a new energy power plant can be acquired accurately, and power quantity of all electric energy meters on a settlement site can be acquired at a specified moment of time. As the power metering system is equipped with the monitoring component, the electric energy meters and the power acquisition device can be monitored in real time, and normal work of the electric energy meters and the power acquisition device is ensured. An alarm module sounds fault alarm in time when there is a fault, so that the accuracy of acquired metered power quantity is ensured.