Currently numerous virtual universities and learning centers are in full operation at home and abroad. Accordingly universities and companies are faced with the problem of verifying the effectiveness of the Web-based training but there is not sufficient systematic research outcome. In this paper, first, the effectiveness of web-based training has been reviewed on the basis of Kirkpatrick\'s four-level assessment model. Second, the efficiency of web-based training has been analyzed in comparison with traditional collective training. As far as effectiveness is concerned, the result of the level 1 assessment shows that 68.1% of the trainees was satisfied whereas only 7.1% dissatisfied. The level 2 result was positive across the sections covered. The level 3 result was that out of a total of 43 respondents, 14 answered they are still using what they learned 4 months after the training, and 6 answered in the negative, and the rest, partly. Many people gave high marks especially to work efficiency/productivity increase and planning/reasoning power up. The levle 4 result showed conspicuous difference between those who have received the training and those who have not. That means those who received the training achieved performance mark \"A\" relatively more and mark \"C\" relatively fewer. In terms of efficiency, the associated cost of the training is only about one fifth compared to the collective training and work can be continued while getting the training. Therefore a lot of indirect cost and time can be saved.