At present the analysis of emerging industry, especially the strategy researches on high-tech emerging industries lack of quantitative analysis and micro-level approaches. This paper sets the information technology(IT) industry in Beijing as the object of study. Combine the methods of authorized ratio, R&D capability, patent technical-value, technology opportunity, technology advantage with patent mapping analysis. Based on the patent data of China and worldwide, analyze the strengths, weaknesses, opportunities and threats in the IT industry in Beijing by SWOT model. By the comparative analysis of Beijing and other regions, find the IT industry development direction for Beijing. Finally put forward the development strategy for promoting IT industry. The results show that the ideas and analysis methods in this study can add value to the emerging industries researches in China and worldwide.