As a new kind of Autonomous Underwater Vehicle(AUV)，Autonomous Underwater Gliders(AUG) move based on the principle of buoyancy-driven. They control their own state of motion through adjusting the sliding block to change the relative positions of the focus and the center of buoyancy. The shape of AUG is firstly designed， and meanwhile each system component is also preliminary designed and their general layout is conducted. Then， Matlab is used to obtain the motion characteristics of the AUG depending on the hydrodynamic parameters. Thus，the relationships between horizontal displacement of parameters(such as angle of attack(AOA)，angle of pitch(AOP) and horizontal velocity)with the center of gravity in the steady condition and the net floating mass will be achieved. The trajectory of the AUG in the vertical plane is simulated and analyzed by using Simulink software. The results show the validity and feasibility of the presented system design method.
