  We present a multiple emission lines study of $\sim$1300 H$\alpha$ emitters
(HAEs) at $z \sim 2.3$ in the ZFOURGE survey. In contrast to the traditional
spectroscopic method, our sample is selected based on the flux excess in the
ZFOURGE-$K_s$ broad-band data relative to the best-fit stellar continuum. Using
the same method, we also extract the strong diagnostic emission lines for these
individual HAEs: [OIII]$\lambda\lambda4959,5007$,
[OII]$\lambda\lambda3726,3729$. Our measurements exhibit good consistency with
those obtained from spectroscopic surveys. We investigate the relationship
between the equivalent widths (EWs) of these emission lines and various galaxy
properties, including stellar mass, stellar age, star formation rate (SFR),
specific SFR (sSFR), ionization states (O32). We have identified a discrepancy
between between HAEs at $z\sim2.3$ and typical local star-forming galaxy
observed in the SDSS, suggesting the evolution of lower gas-phase metallicity
($Z$) and higher ionization parameters ($U$) with redshift. Notably, we have
observed a significant number of low-mass HAEs exhibiting exceptionally high
$EW_{\mathrm{[OIII]}}$. Their galaxy properties are comparable to those of
extreme objects, such as extreme O3 emitters (O3Es) and Ly$\alpha$ emitters
(LAEs) at $z\simeq2-3$. Considering that these characteristics may indicate
potential strong Lyman continuum (LyC) leakage, higher redshift anaglogs of the
low-mass HAEs could be significant contributors to the cosmic reionization.
Further investigations on this particular population are required to gain a
clearer understanding of galaxy evolution and cosmic reionization.
