  Built upon the state-of-the-art model a multiphase transport (AMPT), we
develop a new module of chiral anomaly transport (CAT), which can trace the
evolution of the initial topological charge of gauge field created through
sphaleron transition at finite temperature and external magnetic field in heavy
ion collisions. The eventual experimental signals of chiral magnetic
effect(CME) can be measured. The CAT explicitly shows the generation and
evolution of the charge separation, and the signals of CME through the CAT are
quantitatively in agreement with the experimental measurements in Au+Au
collision at $\sqrt{s}=200 {\rm GeV}$, and the centrality dependence of the CME
fraction follows that of the fireball temperature.
