This paper investigated the problem of chaotic attitude and reorientation maneuver for completely viscous liquidfilled spacecraft with flexible appendage. All the equations of motion were derived by using Lagrangian mechanics and transformed into the form consisting of an unperturbed part plus perturbed term in order to exploit the system’ nonlinear characteristics in phase space. We emphases on the chaotic attitude dynamics produced from certain sets of the physical parameter values of the spacecraft when energy dissipation acts to derive the body from minor to major axis spin. The orientation of the spacecraft relative to the inertially fixed angular momentum vector is unpredictable because of the occurrence of chaotic dynamics during spinaxis transition. This paper demonstrated that the desired reorientation maneuver was guaranteed by using a pair of thruster impulses. The control strategy for reorientation maneuver was designed, and the numerical simulation results were presented for both the uncontrolled and controlled spins transition.