modeling the process of information diffusion is a challenging problem. although numerous attempts have been made in order to solve this problem, very few studies are actually able to simulate and predict temporal dynamics of the diffusion process. in this paper, we propose a novel information diffusion model, namely gt model, which treats the nodes of a network as intelligent and rational agents and then calculates their corresponding payoffs, given different choices to make strategic decisions. by introducing time-related payoffs based on the diffusion data, the proposed gt model can be used to predict whether or not the user's behaviors will occur in a specific time interval. the user's payoff can be divided into two parts: social payoff from the user's social contacts and preference payoff from the user's idiosyncratic preference. we here exploit the global influence of the user and the social influence between any two users to accurately calculate the social payoff. in addition, we develop a new method of presenting social influence that can fully capture the temporal dynamics of social influence. experimental results from two different datasets, sina weibo and flickr demonstrate the rationality and effectiveness of the proposed prediction method with different evaluation metrics.