There are many documents related to Van Don Ancient Trading Port (ATP) system, most of which have been published by historians and archaeologists based on historical literature or excavation results, and in general a consensus has been reached. Based on reference, aggregation of existing documents, and additional investigations and surveys, following the article will analyze the perspective of natural characteristics and conditions and signs of the premise of Van Don trading port through the periods to clarify the formation, development, and decline of the Van Don ATP system. This is also the clearest evidence of the Vietnamese tradition of exploiting and using sea and islands.