  Quantum state discrimination depicts the general progress of extracting
classical information from quantum systems. We show that quantum state
discrimination can be realized in a device-independent scenario using tools of
self-testing results. That is, the states can be discriminated credibly with
the untrusted experiment devices by the correspondence between quantum
correlations and states. In detail, we show that two arbitrary states can be
discriminated in a device-independent manner when they are not conjugate with
each other, while other states can be discriminated
measurement-device-independently. To fulfill the device-independent
requirement, the measurements are restricted on Pauli observables. The
influence of this restriction is acceptable based on the guessing probability
analysis for minimum error discrimination.
