  Quantum chromodynamics (QCD) claims that the major source of the nucleon
invariant mass is not the Higgs mechanism but QCD energy momentum tensor trace
anomaly. Although experimental and theoretical results support such conclusion,
a direct demonstration is still absent. We present the first Lattice QCD
calculation of the quark and gluon trace anomaly contributions to the hadron
masses, using the overlap fermion on the 2+1 flavor dynamical Domain wall quark
ensemble at $m_{\pi}=340$ MeV and lattice spacing $a=$0.1105 fm. The result
shows that the gluon trace anomaly contributes most of the nucleon mass, and
the contribution in the pion state is smaller than that in others nearly by a
factor 10. The quark mass and gluon anomalous dimensions are comparable with
the continuum theoretical prediction under $\overline{\textrm{MS}}$ scheme at
the scale $\mu=1/a$=1.785 GeV.
