  We present a clean, magnitude-limited (IRAC1 or WISE1$\leq$15.0 mag)
multiwavelength source catalog for the LMC. The catalog was built upon
crossmatching ($1''$) and deblending ($3''$) between the SEIP source list and
Gaia DR2, with strict constraints on the Gaia astrometric solution to remove
the foreground contamination. The catalog contains 197,004 targets in 52
different bands including 2 ultraviolet, 21 optical, and 29 infrared bands.
Additional information about radial velocities and spectral/photometric
classifications were collected from the literature. The bright end of our
sample is mostly comprised of blue helium-burning stars (BHeBs) and red HeBs
with inevitable contamination of main sequence stars at the blue end. After
applying modified magnitude and color cuts based on previous studies, we
identify and rank 2,974 RSG, 508 YSG, and 4,786 BSG candidates in the LMC in
six CMDs. The comparison between the CMDs of the LMC and SMC indicates that the
most distinct difference appears at the bright red end of the optical and
near-infrared CMDs, where the cool evolved stars (e.g., RSGs, AGB, and RGs) are
located, which is likely due to the effect of metallicity and SFH. Further
quantitative comparison of colors of massive star candidates in equal absolute
magnitude bins suggests that, there is basically no difference for the BSG
candidates, but large discrepancy for the RSG candidates as LMC targets are
redder than the SMC ones, which may be due to the combined effect of
metallicity on both spectral type and mass-loss rate, and also the age effect.
The $T_{\rm eff}$ of massive star populations are also derived from
reddening-free color of $(J-K_{\rm S})_0$. The $T_{\rm eff}$ ranges are
$3500<T_{\rm eff}<5000$ K for RSG population, $5000<T_{\rm eff}<8000$ K for YSG
population, and $T_{\rm eff}>8000$ K for BSG population, with larger
uncertainties towards the hotter stars.
