  We propose an experimentally accessible single-photon routing scheme using a
$\bigtriangleup$-type three-level atom embedded in quantum multi-channels
composed of coupled-resonator waveguides. Via the on-demand classical field
applied to the atom, the router can extract a single photon from the incident
channel, and then redirect it into another. The efficient functions of perfect
reflection of single photon signal in the incident channel is rooted in the
coherent resonance and the existence of photonic bound states.
