Abstract
This study analyzed the technological competitiveness of Korea and China in the electric vehicle industry through natural language big data processing techniques. In order to establish a standard for comparative analysis, patent abstract data from four countries, including Korea, the United States, Japan, and China, was analyzed with the LDA model to classify electric vehicle technology into 30 technology-specific topics. Next, Korean and Chinese patents were analyzed again using the topic model, divided into 27 and 16 topics, respectively, and then each topic was linked through keywords analysis.
 As a result, it was found that both Korea and China had advantages in machinery parts and in management of cells, modules and packs. However, the two countries showed overlapping technology fields both competitive technology areas and non-competitive technology areas. When evaluating the quality of patents of both countries, Korea’s level was somewhat higher than that of China’s. However, compared to that of the United States and Japan, countries did not have a high level of technology.
 Considering the technological characteristics of Korea and China, the electric vehicle industry in Korea needs to introduce necessary technologies from the US or Japan or attempt strategic alliances with companies in these countries rather than a cooperative relationship with China.
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