Abstract: This study deals with analytical solution of time-dependent partial differential equations. The analyses are carried out by the means of Homotopy Analysis Method (HAM), Homotopy Perturbation Method (HPM) and Variational Iteration Method (VIM). The results have been compared and depicted graphically. It is shown that the presented approaches are very effective, straightforward and capable to the analytical solutions of the large classes of linear or nonlinear time-dependent partial differential equations while this set of problems is widely spread in Engineering.