The invention discloses an iris recognition method and device based on cloud technology, and the method comprises the following steps: step 1, enabling a standard comparison image to generate a standard comparison feature code, and storing the standard comparison feature code in a cloud big database; step 2, configuring front-end equipment; step 3, enabling an iris recognition camera to collect image video data to obtain iris video stream data; step 4, capturing each frame of picture in the video stream, generating an acquisition feature code from the picture, and transmitting the acquisitionfeature code to a cloud big database; step 5, enabling the cloud big database to receive the collected feature codes, compare the collected feature codes with the standard comparison feature codes andsearch the standard comparison feature codes to obtain a comparison result; and step 6, enabling the cloud big database to transmit the comparison result to a front-end feedback unit through a communication unit for result feedback. The invention is realized based on cloud big data, is high in storage operation processing capability and excellent in algorithm performance, can be quickly and accurately identified, is convenient for manual confirmation, rechecking and identification, and has the characteristics of safety, intelligence and convenience.