  Massive young stellar objects (MYSOs) play a crucial role in star formation.
Given that MYSOs were previously identified based on the extended structure and
the observational data for them is limited, screening the Wide-field Infrared
Survey Explorer (WISE) objects showing green features (for the common coding of
the 4.6 $\mu$m band as green channel in three-color composite WISE images) will
yield more MYSO candidates. Using WISE images in the whole Galactic Plane ($
0^\circ<l<360^\circ $ and $\mid b \mid <2^\circ$), we identified sources with
strong emissions at 4.6 $\mu$m band, then according to morphological features
divided them into three groups. We present a catalog of 2135 WISE Green Objects
(WGOs). 264 WGOs have an extended structure. 1366 WGOs show compact green
feature but without extended structure. 505 WGOs have neither extended
structure nor green feature, but the intensity at 4.6 $\mu$m is numerically at
least 4.5 times that of 3.4 $\mu$m. According to the analysis of the
coordinates of WGOs, we find WGOs are mainly distributed in $\mid l \mid<
60^\circ$, coincident with the position of the giant molecular clouds in $\mid
l \mid> 60^\circ$. Matching results with various masers show that those three
groups of WGOs are at different evolutionary stages. After cross-matching WGOs
with published YSO survey catalogs, we infer that $\sim$50% of WGOs are samples
of newly discovered YSOs. In addition, 1260 WGOs are associated with Hi-GAL
sources, according to physical parameters estimated by spectral energy
distribution fitting, of which 231 are classified as robust MYSOs and 172 as
candidate MYSOs.
