The overall architecture, logical architecture, and application architecture of the basic platform for intelligent waterways in seaports were constructed. Key technologies were researched, such as full-element intelligent sensing, high-precision hydrodynamic sediment simulation, and automatic operation of the forecast system. On this basis, the basic platform for intelligent waterways was developed with Tianjin Port as a case study. The platform achieved real-time intelligent sensing of meteorological, hydrological, sedimentary, and vessel-related elements, along with simulated calculations of critical environmental elements such as water level, flow velocity, and water depth for the next 72 h. The platform operated automatically on the Tianhe supercomputer, achieving intelligent and dynamic forecasting of the navigation environment. Based on the normal operation of the basic platform for intelligent waterways in Tianjin Port for over one year, the experiences and lessons learned from the construction of the basic platform, as well as the directions for supporting waterway maintenance, navigation guarantee, and other aspects of intelligent production and operation management services of waterways, were discussed.