A charging method includes that after receiving a charging request, a master control device arranges a parking space for an electric vehicle to be charged and sends a traction device a movement instruction generated from the charging request; the traction device drives, according to the movement instruction, a charging controller to move along a guide rail to above the electric vehicle to be charged; the master control device sends a cable transferring instruction to a cable transferring device and the cable transferring device starts to lower a cable; after the cable transferring device lowers the cable to a preset position, the master control device sends a stop instruction to the cable transferring device and the cable transferring device stops lowering the cable; and the cable charges the electric vehicle to be charged.