Incidental gallbladder cancer (IGBC) is a kind of disease which has been performed the surgery owing to benign gallbladder disease but finally is found as a cancer by intraoperative frozen pathological examination or postoperative paraffin pathology examination. Compared with the case of gallbladder cancer that has been diagnosed before surgery, the pathological stages of IGBC patients are usually earlier and it is possible to improve the prognosis as well as let patients survive without disease for a long time by choosing appropriate treatment. Part of IGBC patients clearly diagnosed as gallbladder cancer through intraoperative frozen pathological examination and complete the radical surgery for gallbladder cancer. However, there're still many patients with IGBC don't have intraoperative frozen pathological examination during operation, or though has the intraoperative examination been done, which don't report the cancer. Therefore, for those people, the follow-up treatments should be paid attention to after the diagnosis being cleared by paraffin pathology examination.