TURBOCHARGE SYSTEM

Provided is a turbocharger system capable of simultaneously improving a fuel efficiency and obtaining a satisfactory hill start performance due to a downsized engine. The turbocharger system includes an electric assist turbocharger (2) which includes a turbine (3) disposed in an exhaust passage (6) of an engine (E) and driven by an exhaust gas, a compressor (4) disposed in an intake passage (7) and driven by a rotational torque of the turbine (3), and an electric motor (5) assisting a driving force of the compressor (4) and an electric motor control unit (21) which drives the electric motor (5) when detecting a start operation at a sloping road.