Temperature field and dynamic performance of a twodimensional plate with planar motion is investigated. Considering the coupling influence of the temperature and elastic deformation, the entropy density is calculated, and the thermal conductive variational equations are derived. Furthermore, considering the thermal strain, dynamic variational equations of the plate are obtained in the status of planar stress. Finite element method is employed for discretization of temperature and deformation fields in the plate. Finally, the temperature and deformation fields are calculated. Coupling characteristics of the heat, deformation and motion of the plate is revealed, and significant effect of the motion on the temperature and deformation fields is shown.