The commissioning of NbTi/Cu superconducting coils was monitored using embedded fiber Bragg grating sensors (FBG) to develop internal temperature and strain responses.FBG are arranged at various positions along a single mode fiber inside the coil.Internal temperature and strain will vary the gratings periods,which can be read out with a tunable laser in a wavelength division-multiplexing (WDM) scheme.A multi-compensation method were also introduced for distinguish coupledeffects of both thermal strain and mechanical strain during superconducting coils cooling.More rapid cooling was also applied to test the internal sensitivity of FBG at cryogenic environment.A faster strain acquisition system was used to detect a quech based on strain rate of a supeconducting magnet.It is also clarified that the internal strain and temperature measured in the superconducting coils can give more information characterizing the stability at extreme environments.For the purpose of comparison,the internal thermal strain and temperature was valuated by means of finite elemnt mothod.The simulation predictions and the experimental data show reasonable agreements.