The traditional bionic innovative design method relies too much on the designer's own experience and inspiration, and the design method could be limited by designer’s own thinking. This paper presents a new bionic design method, proposing one kind of special model for the engineering design problem, through obtaining biological text information, after processing and storage in the database, combined with engineering design problems, obtains the corresponding bionic design prototype, and generates the bionic design scheme through bio-engineering mapping. This design method can effectively avoid trapping designers into their own thinking, and this method is helpful for the generation of innovative design scheme. Finally, the meta design of innovative pipeline disinfection robot is shown as an example to verify the feasibility of the method proposed in this paper.