Abstract: The attribute disturbance of knowledge causes the changing of the knowledge law, and the changing laws are called disturbance laws. I3y using one direction S-rough sets and dual of one direction S-rough sets, the concepts of knowledge upper law and knowledge lower law of attribute disturbance were given, knowledge law and the knowledge law of attribute disturbance were discussed, and the inectuality theorems of attribute disturbance knowledge upper law and attribute disturbance knowledge lower law were proposed.

Key words: Knowledge law, Attribute disturbance, Upper law, Lower law, Disturbance knowledge law, Inequality theorem