As mobile devices improve their performance in ubiquitous spaces, they have a variety of applications with more information. Active exploration follows for collecting and utilizing the information accumulated in ubiquitous environment. If user information in mobile devices can be summarized in a more intuitive and interesting form, like cartoon, it can help to share his experience with other people, and recall his meaningful memory. In this paper, we propose a method that organizes a story and generates cartoons using the information collected in ubiquitous environment. We generate cartoons with Petri net-based method, which describes causal relationship between experienced events and the precondition of events. Mobile information used in the experiment is collected from two female undergraduate students for two weeks. We confirm the potential of the proposed method for ambient intelligence through the analysis of the results.