Abstract: The double helix method of the think tank is used to research the priority setting of convergent science. This study analyzes the characteristics, functions, research paradigms and scale of the priority setting model of convergent science, and concludes that the convergent science and priority setting comes under the category of medium-scale think tank research. Furthermore, we explore the key scientific issues of the convergent science and priority setting, which are multiple technology objectives, related discipline areas and the incommensurability of basic conditions. Based on the problem-orientation, science-orientation and evidence-orientation of the double helix structure of think tanks, the "Parsing-Merge-Reduction" method is used for the outer circulation, while the process of convergence method (Data-Information-Intelligence-Solution, DIIS) and logics layer method (Mechanism-Impact-Policy-Solution, MIPS) are used for the inner circulation. This model deconstructs the scientific and technological objectives, related fields and conditional basis into several key factors that can be compared, thus forming a research method for convergent science and priority setting, which can be used by scientific and technological decision-making departments to identify and select the relevant areas in converging science.

Key words: convergent science, priority setting, double helix method of think tank, DIIS, MIPS