Abstract: The article studies its applicability at large and its application in wheat breeding ,then put forward to new thought of wheat breeding systematical pattern. The results show :wheat breeding is a systems engineering, their relation among them is co-related, interacted and co-restricted. The system gets to be controlled by info-feedback with natural and social surrounds, then it can make for a correct way. The author believes that along with the system theory, the information theory and cybernetics correctly instruct to the wheat breeding, the wheat breeding work will certainly on one building.