The invention relates to a high-reliability wireless energy supply system and method. The high-reliability wireless energy supply system comprises a wireless energy acquiring unit and a wireless charging platform unit; the wireless energy acquiring unit comprises a current transformer, a rectifier, a high frequency inverter, a power transmission coil and a power receiving coil; the current transformer, the rectifier, the high frequency inverter and the power transmission coil are connected with each other in sequence; the wireless charging platform unit comprises a wireless charging coil and astorage battery pack; an output end of the power receiving coil is correspondingly connected with an input end of the storage battery pack and an input end of a rectifying and inverting control box;and an output end of the storage battery pack is connected with an input end of the rectifying and inverting control box. The high-reliability wireless energy supply system is applied to a power transmission line; an unmanned aerial vehicle can accurately inspect the whole power transmission line; when the power capacity is insufficient, the unmanned aerial vehicle can land on a wireless chargingplatform on a pole and tower; through a resonant magnetic coupling technology, the unmanned aerial vehicle is wirelessly charged; and when the power capacity is sufficient, the unmanned aerial vehiclecontinues to inspect.