Iris information acquisition method and acquisition system

The present invention provides an iris information acquisition method and acquisition system. The iris information acquisition method comprises: providing at least one group of incident light; acquiring at least two iris images before and after occurrence of the incident light; determining whether irises in the at least two iris images are adaptively changed along with adjustment of light; and if the adaptive change is generated, determining a living body and extracting iris information from the at least two iris images. According to the present invention, the living body is verified through adjusting the incident light, continuously acquiring more than two iris images and determining whether the iris are adaptively changed along with the adjustment of the light; the acquisition method and the acquisition system have the advantages of simplicity for operation, high accuracy, low manufacturing cost and low use cost; and security of user identity authentication is greatly improved.