The invention discloses an energy-saving monitoring and displaying system of an air compressor. The energy-saving monitoring and displaying system comprises a current transducer, a temperature transmitter, a concentrator and a display control terminal, wherein the current transducer is used for detecting the working current of the air compressor, the temperature transmitter is used for detecting the temperature of compressed air exhausted by the air compressor, the concentrator is connected to the current transducer and the temperature transmitter, and the display control terminal is connected to the concentrator. According to the energy-saving monitoring and displaying system of the air compressor, the working current needed by operation of the air compressor is detected in real time through the current transducer, the temperature of the compressed air generated by the air compressor is detected in real time through the temperature transmitter, and the working current and the temperature of the compressed air are displayed through the display control terminal. Meanwhile, a core processor of the display control terminal is used for comparing detected data and preset reference values and working out the amount of energy saved by the current air compressor within the operating time, so that related personnel visually masters the operating state of the air compressor and the saved energy in time.