The existence of the dark matter has been strongly supported from the cosmological observations such as the stellar rotation curves of spiral galaxies and the CMB measurements. The origin and nature of the dark matter however remain largely unknown, which has been among the most active research avenues in both particle physics and cosmology. This talk will give a theoretical overview on the current status of the dark matter studies, along with the examples for the attempts to search for them from the high energy physics and cosmology experiments.