The invention discloses an optical module lighting power control system and a control method therefor. The control system comprises a signal receiving unit, an illuminating unit, an illuminating power detection unit, an isolation unit, an amplification circuit, a current detection unit, a temperature detection unit, a feedback unit, a current control unit and a control unit. The beneficial effects of a technical solution of the optical module lighting power control system and the control method therefor are that intelligent control can be realized according to characteristics of each type of laser device, that output lighting power stabilizes within a 0.5 dB variation range at high and low temperatures of -40 to 85 DEG C can be ensured, working efficiency is greatly improved, the laser device can be prevented from being burnt out, the performance of the laser device can be assessed, service life of the laser device can be determined, early warning can be given in advance, and the laser device can be effectively protected from being burnt out due to excessive currents.