Computer simulation is a promising approach to better understand the crowd psychological dynamics. The lack of real data in crowd simulations, however, usually results in heavy dependence on assumptions, and thus hampers the confidence. This research presents the simulation of crowds under confrontation of psychological stimuli, which focuses on the psychological aspect of the crowd and introduces the intervention between two different relationship spaces in the crowd. Firstly, with the agent-based approach, psychometrics is employed in the construction of the individual model to improve the trustworthiness. Secondly, the research describe, by means of the model, the phenomenon that individuals tend to get involved in various relationship spaces, which plays an important role in the procedure of psychological propagation. Finally, a scenario of a crowd in large-scale public activity under terrorist threat is studied, in which the workflow for psychometrics based crowd simulation is demonstrated, and the preliminary results are also discussed.