  The internal structures of pulsating white dwarfs can be explored only with
asteroseismology. Time series photometric observations were made for the
pulsating DA white dwarf (ZZ Ceti star) WD~0246+326 during 9 nights in 2014
with a bi-site observation campaign. Eleven frequencies were detected including
1 triplet, 2 doublets, and 4 single modes, which are identified as either $l=1$
or $l=2$ modes with the complementarity of frequencies present in the
literature. From the multiplets, the rotation period of \astrobj{WD~0246+326}
is derived as $3.78\pm 0.11$ days. The average period spacing of the l=1 modes
$\Delta P=29.3\pm 0.2s$, implies that \astrobj{WD~0246+326} may be a massive ZZ
Ceti star concerning the $\Delta P-M_*$ relationship for the DAVs. Preliminary
analysis derives the stellar parameters of $M_*=0.98\pm0.01$~${\rm M_\odot}$
and $T_{\rm eff}=11700\pm100$~K by fitting the theoretical frequencies of the
eigen modes to the observed ones.
