The utility model relates to a supply of fuel automatic control system particularly, relates to supply of fuel automatic control system and LNG filling ship of LNG filling ship. This system mainly includes: the setting is at power supply unit, operating panel and the industrial computer of goods accuse room, interconnect's operating panel, industrial computer respectively and power supply unit connects, with the supply of fuel control module of supply of fuel headtotail more than one set, supply of fuel control module's quantity is the same with fuel gas supply system quantity, each cover supply of fuel control module is including the supply of fuel controller that connects gradually, promptly cut off controller and measurement element, the supply of fuel controller, promptly cut off controller and measurement element through two redundant CAN nets with the industrial computer is connected with full ship monitoring alarm, the supply of fuel controller, promptly cut off the controller and pass through the rigid line and connect operating panel. The problem of marine LNG fuel supply is automatic hangs down with accuracy nature is solved.