In business or technology planning, it is strongly required to grasp the overall technology trends and predict what will happen in the near future. A deluge of technology information in recent years, however, makes it quite difficult even by domain experts. We have developed the environment where we can detect and analyze the technology trends from the Internet news resources. In our system, we define several quantitative indicators, such as importance and influence of each keyword in the target field, and relativity and superiority of relationships between keywords. According to these indicators, our system detects key concepts around the target field and provides an environment to analyze the technology trends of the target field. In this article, we report some experimental results using our system based on the content from IT news sites, shows the effectiveness or validity of our method compared with human experts' evaluations, and discuss the feasibility to grasp technology trends from the Internet resources automatically in the future.