The utility model discloses an energy -conserving hydrodynamic force ventilation system, it includes through the upper drive of shaft with the ground intercommunication, be equipped with the lower floor's drive through the shaft intercommunication below the drive of upper strata, be equipped with corresponding water catch bowl and catch basin on upper strata drive and the lower floor's drive respectively, be equipped with the collector pipe with lower floor's drive intercommunication below the water catch bowl, be connected with the turbo engine of establishing above the catch basin below the collector pipe, the transmission shaft and the fan of turbo engine are connected, be equipped with on the fan towards the induced duct on ground, be equipped with high pressure water pump in the catch basin, high pressure water pump is last to be equipped with towards the drain pipe on ground. The utility model discloses a pressure realization energy conversion that the water head produced is ventilated, concentrates deposit to the infiltration, and the high pressure emission is carried out to the power consumption peak period of staggering, and the effectual prior art that has solved exists the drainage and the power consumption technical problem how that ventilates.