The invention discloses a laser energy supply system for a substation, and belongs to the field of the state monitoring of apparatuses for substations. The laser energy supply system mainly comprisesthree parts of a far-end laser charging and control module of the far-end laser charging, a crawler-type laser energy supply mobile robot and a high-voltage-end photoelectric conversion and feedback control module. The crawler-type laser energy supply mobile robot comprises a mobile caterpillar, an energy storage battery, a photoelectric conversion module, a laser generator, a laser emission and automatic collimator and a feedback and alarm module. The photoelectric conversion and feedback control module comprises a feedback-type solar panel, a photoelectric conversion module, an energy outputmodule and a state information monitoring module. According to a laser energy supply robot for the substation, which is provided by the invention, the system can be used for monitoring conditions ofthe power supply, the emergency lighting and the like of a device in an online manner at a high-voltage end of the substation, and is used for providing a new method for monitoring the energy supply of the device in the online manner at the high-voltage end of the substation; the use cost of the laser energy supply system is decreased, and the reliability and the safety of laser energy supply areimproved.