Abstract: The Zheng Chenggong group's powerful naval force, which was based on trade and military affairs, has important implications on contemporary China’s national defense reconstruction. If a society's economy is based on overseas trade, it must use navy to maintain its survival. The naval construction is necessary to maintain social existence and development, just as in the inland farming community, a strong army is necessary. The navy construction is an indispensable cost investment. Of course, today a maritime nation's military purpose is simply to maintain a fair and rational international trade order and safeguard its own legitimate commercial and trading interests.