A System such as a port and regional economy has a large boundary and complexity. So, not only the system"s state is considered as a black box but system"s forecast accuracy is very low. Futhermore various components in a port and regional economy influence significantly on each other. To copy with these problem the form of structure models were introduced by suing SD model. This study has the issue of simplifying the regional economic effects of the port as contributng to raising the regional income. The regional economic effects of port have various indirect ones except for this. So, SD(System Dynamics) was presented, and applied to simulate port and regional economy.