  A unique transient bursting radio source, GCRT J1745-3009, has been
discovered (Hyman et al. 2005a) near the direction of the Galactic center. It
is still an open question to explain this phenomenon, although some efforts to
understand its nature have been made. This paper shows that most of the
observed features can be reproduced by our proposed precessing pulsar model. It
is found that the precession angle of the pulsar should be larger ($\ga 15^{\rm
o}$) than that of previously known precessing pulsars, which have a precession
angle $\la 10^{\rm o}$, if the beam width of the pulsar is larger than 10
degree. The pulsar could be a nulling (or even extremely) radio pulsars to
account for the transient nature of the source. This model can be confirmed if
a pulsar is detected at the position of the source. The pulsar could hardly be
a normal neutron star (but probably a solid quark star) if the spin period of
the pulsar is detected to be $\ga 10$ ms in the future.
