  Quantum coherence is a key resource in quantum information processing
scenarios, and quantifying coherence is an important task for both quantum
foundation and quantum technology. However, until now, all most of coherence
measures are basis-dependent that does not accord with physical reality, since
the physical properties of the physical system should not be changed with the
different choice of coordinate systems. Here, we propose an \textit{intrinsic
basis-independent quantum coherence measure} which satisfies all conditions for
quantifying coherence. This measurement not only reveals physical essence of
quantum coherence of the quantum state itself clearly, but also simplifies the
measurement procedure by avoiding the optimization procedure of distance
measure.
