A technology tree(Tech tree) is used to represent attribute information such as the function, purpose, and components of a technology, and is a useful tool to support decision-making on technology development in a particular technology area. But there is a limitation in the construction of Tech tree that it is difficult to reflect rapidly changing technologies properly due to the highly dependent of experts in the technology field. So, this research is aimed to reducing reliance on expert dependence by presenting a methodology that automates the construction of a Tech tree by focusing on the functional information of the technology, and to analyzing and present the attribute information of the technology. The information in the patent document is used to classify similar technology groups, and the text inside the patent document is used to identify the functional relationship of the detailed technology of each technology group. The results of this research will be utilized to provide information that can support R&D planning and decision-making on building a technology portfolio by providing information on technology relevance and technology development status.
