In recent years, exchanges have frequently taken place among people on both sides of the Taiwan Strait. However, the effect of Cross-Strait social contact on future Mainland policy is a topic seldom examined by researchers in Taiwan, and it thus deserves further exploration. This study tries to find out the relationships between social contact, political attitudes, perceptions of Mainland China and responses to Mainland policy. This study collected 366 valid samples from 25 counties in Taiwan. A random sampling method was applied in order to collect data with the help of a 'computer assisted telephone interviewing' (CATI) system. Through hierarchical regression, this study verifies those research hypotheses that we explored. The statistical results confirm the positive relationship between social contacts and the Taiwan people's support for the mainland policy. Furthermore, this study also confirms the economic interdependence between Taiwan and Mainland China. The supports for mutual establishment of banks across the Strait are higher among the citizens of Kinmen than among Taiwan.