The Combined anti-roll device with passively controlled anti-rolling tank and course rudder, and the ship lateral motion modeling method using the compound stochastic control are proposed in the paper. On one hand, using Kalman filter in to come out interaction estimate and adopt to pen-loop compensation controls, which carrys on compensating to the wave interference; On the other hand, using the stochastic LQG Suboptimal Control to carry on the control toward the ships horizontal carriage. Imitate true result express, this kind of compound control a method to have good effect, more commendable in the engineering the application.