  Using a two-level moving probe, we address the temperature estimation of a
static thermal bath modeled by a massless scalar field prepared in a thermal
state. Different couplings of the probe to the field are discussed under
various scenarios. We find that the thermometry is completely unaffected by the
Lamb shift of the energy levels. We take into account the roles of probe
velocity, its initial preparation, and environmental control parameters for
achieving optimal temperature estimation. We show that a practical technique
can be utilized to implement such a quantum thermometry. Finally, exploiting
the thermal sensor moving at high velocity to probe temperature within a
multiparameter-estimation strategy, we demonstrate perfect supremacy of the
joint estimation over the individual one.
