In this paper, the progress of recent climatological research on tropical cyclone (TC) activity over the western North Pacific conducted by the Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences (IAP/CAS), and associated domestic and international studies are synthesized and reviewed. In addition to recent climatological studies on the large-scale circulation patterns favorable to TC genesis and their barotropic energy conversions to eddies in summer and autumn, interannual, interdecadal, and intraseasonal variabilities of TC activity over the western North Pacific and their future changing trends attributed to global warming are reviewed. Moreover, recent research on the dynamical effects of the monsoon trough and convectively coupled tropical waves on tropical cyclogenesis over the western North Pacific are discussed. In addition, many important domestic and international studies associated with the abovementioned investigations are also systematically reviewed. Climatological problems of TC activity over the western North Pacific, which are urgently needed to be studied further in the future, are also pointed out in this paper.