The present invention provides a power generation and energy saving system for emergency communication base station emergency, comprising a DC generator for outputting DC voltage. The output end of the DC generator is connected in parallel with a battery. The system further comprises a first open-loop current sensor, a second open-loop current sensor, a current-to-voltage conversion unit and a control unit. In the meantime, the present invention also proposes a power generation saving method for communication base station emergency. The invention has the beneficial effects that the agreed output of the generator is reduced under the load of the same equipment and the purpose of energy saving and emission reduction is achieved, the cost of generating the direct current generator is reduced, and the use is convenient and the performance is maximized.