A power generator system, including a remaining fuel detector detecting a remaining fuel amount of each of the first generator and the second generator, an operable time calculator calculating a remaining operable time of the each of the first generator and the second generator based on the remaining fuel amount detected by the remaining fuel detector, and a signal output unit outputting a control signal for adjusting outputs of the first generator and second generator to an actuator so that the remaining operable time of the first generator and the remaining operable time of the second generator calculated by the operable time calculator is equalized while keeping a total power of the first generator and the second generator constant.