The embodiment of the invention discloses an intelligent high-voltage insulation conductor piercing electricity taking method and mechanism and a metering device, which are used for solving the problems that the existing piercing electricity taking is limited by the route of a high voltage insulation conductor and the needed piercing force. The method comprises the following steps: receiving a piercing command, and then executing the piercing command, to be specific, controlling a drive motor to rotate forwards, so that a piercing cutter blade group is close to the high voltage insulation conductor; detecting a primary drive current of the drive motor in real time; adjusting an output voltage of the drive motor according to the primary drive current, so that the piercing cutter blade group pierces the high voltage insulation conductor; and detecting whether the piercing cutter blade group is switched on or not in real time, and if so, controlling the drive motor to stop rotating.