Unmanned underwater vehicles have many applications in scientific, military, and commercial area due to its autonomy. In many cases, the underwater vehicle usually adopts the control algorithm based on the tactical inertial sensor for the precise control. However the control algorithm using the tactical inertial sensor is not suitable for some underwater vehicle’s missions as like the decoy of the torpedo. This paper proposes the control algorithm of unmanned underwater vehicle which doesn’t needs the precise control. The control algorithm which is adopted with low cost MEMS inertial sensor is proposed for the unmanned underwater vehicle and the simulation using the specification of the MEMS inertial sensor under developing is performed for the verification of control algorithm under real environment and the results of the simulations are presented.