  We systematically investigate the possibility of finding CP/T violation in
the $\tau$ sector at Tau-Charm Factory. CP/T violation may occur at $\tau$ pair
production process, expressed as electric dipole moment, and at $tau$ decay
processes. By assuming that electric dipole moment as large as $10^{-19}$e-cm
and CP/T violation effect orignating from $\tau$ decay as large as $10^{-3}$
are observable at Tau-Charm Factory, we studied all the possible extensions of
the SM which are relevent for generating CP/T violation in $\tau$ sector. And
we pointed there are a few kind of models, which are hopeful for generating
such CP/T violation. For these models we consider all the theoretical and
current experimental constraints and find that there exists some parameter
space which will result in a measurable CP/T violation. Therefore we conclude
that Tau-Charm Factory is a hopeful place to discover CP/T violation in $\tau$
sector.
