The human brain is an optimization of multisensory information integration system. The study of audiovisual information integration can helps to reveal processing mechanism of human brain. It was very important to explore multi-sensor data fusion theory model. In the present study, we designed two experiments to investigate the effects of temporal-spatial unpredictable auditory information on temporal-spatial coincident audiovisual integration. Our results showed temporal-spatial unpredictable auditory information increased the strength of attention, and significantly improved visual detection rates. In addition, through the comparison with the results in another study we speculate that the temporal unpredictable auditory information has less of no effects on audiovisual integration.