The existence of dark matter in the universe has been confirmed by a lot of astronomy observations. However, we do not know the properties of dark matter yet. In order to learn the nature of dark matter, many experiments searching for dark matter are taking data or are under construction. By direct detection the experiments look for the signal when the dark matter particles scatter off the nuclei of the detector material; by indirect detection the experiments look for the annihilation products of dark matter, such as the high energy gamma rays, neutrinos, positrons or anti-protons. To study the signals, not only the particle nature of the dark matter should be well known, but the astrophysical nature of dark matter should also be well known, such as the profile of dark matter in the galaxies or in the clusters of the galaxies. As more experiments are going to take data we expect the nature of dark matter will be solved in the near future.