Abstract: Aiming at \controlling cause" problem on Cause-effect control theory and technology, a dynamic logic relation model is studied and multi-cause systems are well controlled. A cloud control method is used to design the model and to handle massive data in control processing. Due to coupled problems, a decoupled observer is designed to decouple the unknown relationships in multi-cause systems. A distributed model predictive control method is proposed to give an overall optimization control scheme, so that the best control performance is achieved. A simulation of a crime problem is provided to demonstrate e®ectiveness of the proposed methods in this paper.