Abstract: A bean defect sorter includes a container configured to store beans, a transfer guide configured to receive the beans from the container and to guide each bean in series, the transfer guide being configured to discharge the beans one by one, a rotary configured to rotate in a predetermined direction and to receive each of the beans discharged from the bean dispenser, an imaging device configured to provide a bean image of one or more of the beans, a processor including a learning algorithm that is configured to classify each bean as one of a normal bean, a defective bean, and an indeterminable bean, a bean sorter configured to discharge each bean from the rotary by using air pressure according to a classification result, a storage configured to store each of the normal bean, the defective bean, and the indeterminable bean, and a residual bean collector to process escaped beans.