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New pseudoscalars, axion-like particles (ALPs), provide the exciting targetfor present and future collider-based experiments. Search for ALPs is performedin this paper via the $W^{+}W^{-}$ fusion process$e^{-}e^{+}\rightarrow\nu_{e}\overline{\nu_{e}}a\rightarrow\nu_{e}\overline{\nu_{e}}f\overline{f}$at the $1$ TeV ILC corresponding to an integrated luminosity of $1$ ab$^{-1}$and the beam polarization $P(e^{-}$, $e^{+}) = (-80\%$, $+20\%)$. Owing to thegood capability of the ILC in performing b-tagging and the sufficiently largebranching ratio of the ALP decaying into a pair of b quarks, the decay channel$a\rightarrow{b\overline{b}}$ is mainly concerned. The prospectivesensitivities provided by the ILC on the ALP-fermion coupling as low as $1$TeV$^{-1}$ and $1.75$ TeV$^{-1}$ are derived at $95\%$ confidence level in theALP mass intervals $37-50$ GeV and $52-300$ GeV, respectively. Our results willhelp to probe significant parameter space in an unexplored region beyond theexisting constraints.

Detecting the coupling of axion-like particles with fermions at the ILC