  We propose a scheme to realize the single-photon transport affected by the
temperature. The scheme is composed by a waveguide-atom interacting structure
linked to a thermal bath. The single-photon reflection coefficient can be tuned
by adjusting the temperature of the thermal bath. This provides a thermal
control of the single-photon transport. Moreover, the temperature of the
thermal bath can be estimated by measuring the single-photon transport. It is
feasible that the estimation on the temperature is sensitive to slight changes
of low temperature. This implies an avenue for implementing the optical
thermometer with the ability to accurately measure the sample temperature in
the low-temperature region.
