In order to achieve highperformance of the control system, fractionalorder PIλ controller was applied to directdrive permanent magnet synchronous generation (PMSG) wind turbine systems. Focused on the fractionalorder PIλ controller parameters design method of system mentioned above. Through the system simulation and comparative analysis, the result showed that the fractionalorder PIλ controller system had faster response speed and higher power output performance than the integerorder one. The fractionalorder PIλ controller system had certain development potential and practical value in PMSG wind turbine systems.