In this paper,we report the dynamical behaviours of a four-dimensional autonomous continuous dissipative system analysed when the parameter is varied in the range we are interested in.The system changes its dynamical modes between periodic motion and quasiperindic motion.Furthermore,the existence of two-torus is investigated numerically two-torus are observed and proved to have the structure of ring torus and ho torus,both of which are known to be the standard tori.