An internet-based distance learning system was developed for two courses system analysis/database and case-control study, to supplement a regular in-class lecture as an experimental basis. This study was conducted to evaluate its effectiveness in terms of satisfaction level. The professors who were in charge of courses designed the curriculum and prepared the contents in such a way to be suitable to the distance learning. They also conducted the classes accordingly. According to the survey conducted from 21 graduate school students, 66.7% of them were satisfied with the system and 76.2% of them stated that they would recommend this system to other subjects. Specifically, 78.6% of them were satisfied because it provided sites where they could get assistance on their study, 75% of them satisfied because they could concentrate better on their work, and 75% of them satisfied because the information on the internet was directly related with their class contents, 83.3% of them were satisfied because of appropriateness of fonts and organization factors of the sites that have information, and 80% were satisfied because of the adequate quantity of information and speed.