Abstract: Blanket is key component in Fusion Reactor.Blanket designing is a“multi-object,multi-variables”optimization process,and it will cost several weeks to several months to design a suite of blankets.The paper introduces visual parameter analysis method into blanket concept design,by combining domain knowledge,optimization technology,and human interaction technology,and a visual intelligent computer-aided concept design method is presented.The presented method consists of three phases:interactive creation of draft design,automatic generation of primary design and visual interactive optimization of design.For each phase,the key technology and algorithm are researched and implemented,and computer-aided design software is realized.ITER(international thermonuclear experimental reactor)blanket is used for testing and verification.Scientist usually spent three months to design the blanket,but it takes only about 2 weeks by using our software,which demonstrated our method’s effectiveness.