Abstract: Peritoneal carcinomatosis (PC), defined as the primary or secondary occurrence/progression of malignant tumor in peritoneum, is a long-standing challenge in clinical oncology. The treatment and development of PC are inseparable from the cooperation of oncologists around the world. The Peritoneal Surface Oncology Group International (PSOGI), founded by leading global oncologists, is committed to coordinating and accelerating studies on the mechanisms, prevention and treatment of PC, as well as vigorous promotion of the most appropriate integrated treatment strategies throughout the world. The ultimate goal of this international organization is to block the occurrence and development of PC in the natural history of gastrointestinal and gynecological tumors, and convert PC from a terminal condition to controllable, preventable and treatable disease status. Bearing this in mind, this paper systematically summarizes the development of PSOGI from the following five aspects: the historical background of PSOGI, the educational courses of the conferences, the results of the conferences, multi-center researches, and the future of PSOGI. This will help crystalize the PSOGI missions and development strategies.