The invention provides an intelligent full automatic alarming and water pumping security and protection system for ship cabin water leakage. The intelligent full automatic alarming and water pumping security and protection system comprises a floating ball, a controller, a starter, a diesel engine, an electric pump, an electric generator and an accumulator which are mounted at the bottom of a ship cabin; the floating ball, the electric generator, the electric pump and the accumulator are connected with the controller; the starter is connected with the accumulator through the controller; the floating ball is used for sensing and detecting the water level of the ship cabin, and transmitting a signal to the controller; the accumulator supply electricity to the starter; the starter is used for the diesel engine; the diesel engine drives the electric generator to generate electricity through a transmission mechanism; the electric generator charges the accumulator and supply electricity to the electric pump through the controller; and the electric pump is used for water pumping. The whole project is intelligent and automatic, manual operation is not needed, automatic water pumping is conducted after ship cabin water leakage is sensed and detected, after water pumping is finished, automatic shutdown is conducted, in the period, the accumulator is automatically charged and protected, in addition, a water level alarm and a mobile phone annunciator take the automatic alarming effect, the work operation time is lasting, and convenience, security and guarantee are achieved.