The dissertation is aim to consider the minimax problem on a two-person zero-sum dynamic game. Let X and Y be the stochastic strategy spaces of players I and II, respectively, in a two-person zero-sum dynamic game. The establishment of the total value functions of losses and gains with transition probabilities in the game system will perform the property for minimax problem. Further the minimax theorem is proved for the strategy spaces of the two-person zero-sum game if it follows a law of motion. It is also established that the saddle value function exists under certain conditions so that the equilibrium point exists in the game system. In addition to nonfractional type game, it is proved that the fractional function of the total conditional expectations of players I and II which satisfies Ky Fan type minimax theorem under some reasonable conditions.