The invention relates to an integrated fault diagnosis method and a system for turn-to-turn discharging of a transformer. The method comprises the steps of collecting ultrahigh-frequency partial discharging signals, ultrasonic partial discharging signals, pulse current partial discharging signals, primary voltage signals, secondary voltage signals and primary current signals; synchronously collecting and processing the ultrahigh-frequency partial discharging signals, the ultrasonic partial discharging signals, the pulse current partial discharging signals, the primary voltage signals, the primary current signals and the secondary voltage signals for recognizing the source type of partial discharging of the transformer; and comprehensively processing the ultrahigh-frequency partial discharging signals, the ultrasonic partial discharging signals, the pulse current partial discharging signals, the primary voltage signals, the primary current signals and the secondary voltage signals after being processed for obtaining the fault assessment of partial discharging of the transformer and achieving integrated fault diagnosis of turn-to-turn discharging of the transformer.