In recent years, due to flourishing growth of internet, every protocol is approaching standardization and scientific applications are becoming full-grown everyday. Moreover, with the aid of internet educational resource and multimedia instruments, web-based instruction system has been enabled to build an internet learning environment which is different from traditional one. Teaching on the internet can not only overcome the limit of time and space, but also let students become more autonomous in their time and location of learning. Furthermore, all learning activities can be recorded in Web Logs automatically under the circumstances of not interfering with students when browsing learning material, interactive discussion, or team work learning. Because the Web Logs may also contain huge amount of non-educational meaning informations, teachers cannot directly use the Web Logs to observe student learning behaviors and to check learning situations. Many analytical instruments of Web Logs cannot either enable teachers to see educational meaning from Web Logs or carry out learning portfolio analysis. This research is to provide analysis of student Web Logs easily. Therefore, OLAP, and graphic data analytical techniques are used to design a visual learning portfolio analysis system. This system provides teachers to analyze the procedures of learning activities from different perspectives and graphic methods in order to understand the participatory extent of students toward learning activities. Besides, the evidence of students participate in learning activities will be surfaced, which can help teachers to evaluate the learning results effectively.