In order to improve the prediction accuracy of the dead reckoning (DR) algorithm,an improved DR algorithm is proposed based on goal prediction.The algorithm first predicts the goal of avatar according to the calcu-lated attractiveness degrees of materials to avatar,and then calculates its trajectory by combining the actual move-ment.Simulation results show that the improved DR algorithm is superior to the traditional DR algorithm in terms of prediction accuracy,and that it provides a reference for the construction of the ROIA (Real- time Online Interactive Application) cloud platform.