A system for correcting turbo lag of a diesel engine vehicle equipped with a turbo charger and a vacuum pump according to the present disclosure may include: a chamber being supplied with an air/oil mixture discharged from the vacuum pump, separating and storing the mixture into air and oil, and including a first valve for spraying the air and a second valve for discharging the oil; an accelerator pedal sensor sensing a depression extent of an accelerator pedal of the vehicle; a first pressure sensor sensing the pressure of the air compressed in the chamber; and a controller controlling the first valve in accordance with the depression extent of the accelerator pedal sensed by the accelerator pedal sensor.