The invention relates to a method and device for implementing measurement synchronization of near-infrared brain function detector. The device comprises a near-infrared brain function detector and at least one medical instrument with the exception of the near-infrared brain function detector, also comprises a control signal generating device and a control signal transmission module; the control signal generating module generates a synchronous starting measurement signal and a synchronous closing measurement signal; the control signal transmission module transmits the signal in shunt to the medical instrument and the near-infrared brain function detector; the near-infrared brain function detector is provided with a signal capturing module for capturing the signal, a synchronous starting data acquisition module and a synchronous closing data acquisition module, after capturing the signal, the synchronous starting data acquisition module and the synchronous closing data acquisition module respectively control the near-infrared brain function detector to start measurement and interrupt or stop measurement. The invention can enable the near-infrared brain function detector to perform multiple-mode measurement with other instruments synchronously, without changing the other instruments.