TURBOCHARGE SYSTEM

The turbocharger system includes: a high-pressure stage turbocharger (2) including a high-pressure stage turbine (2a) disposed on an exhaust passage (4) and driven by exhaust, and a high-pressure stage compressor (2b) disposed on an intake passage (5) and driven by a rotational torque of the high-pressure stage turbine (2a); and a low-pressure stage turbocharger (3) including a low-pressure stage turbine (3a) disposed on the exhaust passage (4) of a more downstream side than the high-pressure stage turbine (2a) and driven by exhaust, and a low-pressure stage compressor (3b) disposed on the intake passage (5) of a more upstream side than the high-pressure stage compressor (2b) and driven by a rotational torque of the low-pressure stage turbine (3a), wherein the high-pressure stage turbocharger (2) includes an electric motor (2c) that assists a drive force of the high-pressure stage compressor (2b).