The difference between a lighthouse and a watchtower is that a lighthouse is a tower-shaped building. Lighting equipment should be installed in a prominent position at the top of the tower, and attention should be paid to the specific architectural shape, which is convenient for ships to distinguish and become one of the highest points of the port. The watchtower is the most harmonious building in the natural environment. After the development of eco-tourism, it will also serve as a tourist attraction. Lighthouse and watchtower are very different, each plays a different role, and no one can live without the other.