The paper is based on the project "Anti-rolling tank test equipments on the ship" among the country "211" key invested projects. The design and realization of test platform and related theoretical questions are analyzed and further discussed.The test platform of anti-rolling tank on the ship is a kind of special complex system. So far the country has no test equipments in a large scale. The platform test can provide the basis for the design of anti-rolling tank and test data for ships with anti-rolling tank.To test the performance of anti-rolling tank more conveniently,the paper sets up the test platform of two freedoms. The platform can analog rolling and swaying motion of ships. The moment of inertia,damp and comeback can be adjusted. Two electro-hydraulic servo systems analog rolling moment and swaying force of wave respectively. The two systems both use electro-hydraulic servo valves,in which the analog rolling moment system adopts gear-rack swing hydraulic-pressure oil vat with torque sensor,while the analog swaying force system employs double shanks hydraulic-pressure oil vat with two pressure sensors and a placement sensor.Models of electro-hydraulic servo valve,gear-rack swing hydraulic-pressure oil vat and torque sensor are selected in order to analog the rolling moment more accurately. The transfer function of electro-hydraulic moment servo system is presented and the system parameters are gained. At the same time,the simulation of system is studied. What' s more,the application of PID control,optimal control and adaptive control in the electro-hydraulic servo system is developed. The simulation results show that some control strategies are in effect.Considering the realization of the system,the paper adopts incremental mathematical PID controller and manufactures the power board,servo amplified board and signal processing board. And the hardware circuit and sensors are checked and debugged. The run is very good.According to the test platform,the monitoring control system based on computers is designed,which can output voltage signals ofrolling moment and swaying force that regular wave and irregular wave press on ships . The system also gathers and analyzes test data from the sensors. The test results appears on the screen in real time. The system has elementary intelligentized functions. The test requirements can be accomplished through the run.The paper goes on analog rolling motion by forcing regular waves on tank test platform and investigates the anti-rolling performance of passive anti-rolling tank. The test platform runs normally and meets with the test needs. The test validates the anti-rolling principle of passive anti-rolling tank and provides test data for designing and installing anti-rolling tank on ships in the future.The set of equipment is permitted by the country "211" projects in June,2001.