Abstract: This article describes the water based intumescent coating system used on steel (the non-bearing structure) or wood surface of living cabin interior of naval ships. The system is composed of self-curing water based inorganic zinc rich primer and water based tie coat and water based intumescent top coat. The properties of the primer coat, tie coat, top coat and the performance of the coating system are presented respectively. The study on application technology and ship test show that the performance of the coating system has met the strict technical requirements of anticorrosion, fire retardance and non-toxicity. Water-resistance, application performance are greatly improved.