  We study the prospect of using TianQin to detect stellar-mass binary black
holes (SBBHs). We estimate the expected detection number as well as the
precision of parameter estimation on SBBH inspirals, using five different
population models. We note TianQin can possibly detect a few SBBH inspirals
with signal to noise ratios greater than 12; lowering the threshold and
combining multiple detectors can both boost the detection number. The source
parameters can be recovered with good precision for most events above the
detection threshold. For example, the precision of the merger time most likely
occurs near 1s, making it possible to guide the detection of the ground-based
detectors, the precision of the eccentricity $e_0$ most likely occurs near
$10^{-4}$, making it possible to distinguish the formation channels, and the
precision of the mass parameter is better than $10^{-6}$ in general and most
likely occurs near $10^{-7}$. We note, in particular, that for a typical merger
event, the error volume is likely to be small enough to contain only the host
galaxy, which could greatly help in the study of gravitational wave cosmology
and relevant studies through the multimessenger observation.
