This article describes the status of world underground laboratories. The experiments for dark matter searches and neutrino double beta decay continually increase the diversity and size of the experiments. In addition, neutrino oscillation experiments using large water Cherenkov and liquid scintillator detectors enter new generation stages. Therefore, the underground laboratories are expanding rapidly in total area and space. At the same time, the background level requirements get more stringent, and the techniques for the assay and mitigation of ultra-low radioactivity develop. In addition to the astrophysics program, I briefly described the recent multidisciplinary research at the underground laboratories.