Method and system for controlling cabin pressure of bulk liquefied gas in harbor inland river

The invention relates to the technical field of marine equipment, in particular to a bay inland river bulk liquefied gas cabin pressure control method and system, and the method comprises the following steps: planning a corresponding bay inland river transportation route, and building a three-dimensional mobile risk area channel; collecting environment information data of an adjacent area around the air route, and measuring and calculating the minimum distance between the three-dimensional mobile risk area channel and the adjacent air route or the water building; pre-interference analysis is carried out on dangerous areas of the bulk liquefied gas carrier, the ships sailing on the adjacent route and buildings around the route, and risk grading is carried out; determining the navigational speed of the bulk liquefied gas carrier and the power of boil-off gas consumption equipment, and keeping the cabin pressure at the required constant pressure; and according to the determined corresponding harbor inland river