What's the difference between port and customs?

Different definitions have different functions.

1. Different definitions: ports refer to ports, airports, stations and other places designated by the state for foreign economic relations and trade and personnel exchanges. Customs refers to the state administrative organ that supervises and manages the import and export of goods, articles and means of transport.

2. Different functions: the port is mainly responsible for the inspection, inspection and supervision of people, goods, articles and means of transport entering and leaving the country. Customs is mainly responsible for the supervision, taxation, statistics and smuggling of import and export goods, articles and means of transport.