Abstract: Disclosed is a driving circuit and method for a fluorescent lamp. The driving circuit comprises a power factor correction (PFC) stage, a startup stage, an isolation stage, a square-wave driving stage and an output stage. The PFC stage receives and converts an input alternating current (AC) voltage into a direct current (DC) voltage. The startup stage receives the DC voltage and adjusts the DC voltage into an operating voltage. The startup stage is connected in parallel with the square-wave driving stage. The square-wave driving stage is connected to the isolation stage and converts the operating voltage into a boosted square-wave voltage, and the output stage receives the boosted square-wave voltage to ignite the fluorescent lamp. As such, the fluorescent lamp may be rapidly and properly ignited.