There have been attempts to probe a wide range of dark matter candidates, whose mass ranges from 10^{-22} eV to the Planck scale (and beyond Planck scale if they are not particles). After presenting a brief history of dark matter search, I will discuss the dark matter parameter space allowed by the current observation data. I will then illustrate a few popular DM examples including axion-like particles (ALPs), Weakly Interacting Massive Particles (WIMPs), Primordial Black Holes (PBHs) along with the search efforts for those compelling dark matter candidates.