The transfer window is a box installed on the wall of the clean room or other clean equipment. It is mainly used for the transfer of materials, appliances and other items between the clean area and the clean area, and between the clean area and the non-clean area, so as to reduce the number of open doors in the clean room and minimize the pollution in the clean room. The transfer window is equipped with ultraviolet sterilization lamp, and can also be configured with ozone sterilization, electrostatic removal and other configurations according to user needs.