The utility model relates to an ultraviolet hand washing detection system.Including: an image capturing device,Configured to capture an image of a subject's hand after cleaning;1. Ultraviolet irradiation device;Configured to irradiate an ultraviolet light on the hand;One case,It is configured to cover the ambient light and receive the image capturing device and the ultraviolet light illuminating device in its interior.There is an opening.The subject places the hand in the shell through the opening;And a processing device,Respectively with the image capturing device,The ultraviolet irradiation device,The display device is connected.And is configured to control the image capturing device to capture and save the image.And adjusting the intensity of ultraviolet light irradiated by the ultraviolet irradiation device,Power and time length.一種紫外光洗手檢測系統,包含:一影像擷取裝置,配置用以擷取一受試者的手部在清洗之後的一影像;一紫外光照射裝置,配置用以將一紫外光照射於該手部;一外殼,配置用以遮蔽環境光線及接納該影像擷取裝置與該紫外光照射裝置於其內部中,設置有一開口,該受試者通過該開口將該手部放置於該外殼內;以及一處理裝置,分別與該影像擷取裝置、該紫外光照射裝置、該顯示裝置連接,並被配置用以控制該影像擷取裝置而擷取並儲存該影像,以及調整該紫外光照射裝置所照射的紫外光的強度、功率與時間長度。