The invention provides an automatic control device based on iris recognition. The automatic control device comprises an automatic control device and an iris recognizer which is in electrical signal connection with the automatic control device. The iris recognizer comprises a sampling module (1), a preprocessing module (2), a feature coding module (3) and a coding matching module (4). The feature coding module (3) is used for extracting and coding features of an iris image, and comprises a first LBP operator processing sub-module, a second LBP operator processing sub-module, a third LBP operator processing sub-module and a fourth LBP operator processing sub-module. According to the invention, the correlation between a center point and other surrounding areas is increased; image texture of different scales and frequencies can be realized; after repeated processing of the LBP operator processing sub-modules, coding length is constantly reduced without affecting the correlation between the center point and the surrounding areas; storage space is saved; calculation amount is reduced; the recognition speed is improved; the recognition accuracy is enhanced; and high robustness is acquired.