Due to the test requirements of ship latitudinal motion control, a model test system for active control of ship latitudinal motion is designed. According to the system, the demonstration and verification test for ship control schemes and rules were carried out. Meanwhile, a “PC/data acquisition and network module” flexible design scheme was adopted to build a demonstration platform for this type of experiment, relying on virtual instrument technology. It effectively verified the application of yawing/rolling control algorithm of robust control based on linear matrix inequality to rolling stabilization with the combination of rudders and fins. The model test showed that the system can basically verify the control scheme and law of latitudinal motion of target ship, with high integration, good reliability and human-computer interaction interface. Furthermore, it met the test requirements of active control in ship seaworthiness.