The present study purposed to examine the effects of Web-based LT Cooperative Learning strategy in instruction using Flash on the learners` learning attitude, academic achievement and instruction satisfaction. For this purpose, we set research questions as follows. Research Question 1: Is there a difference in learning attitude according to the pattern of learning between the LT Cooperative Learning group and the conventional learning in Instruction using Flash? Research Question 2: Is there a difference in academic achievement according to the pattern of learning between the LT Cooperative Learning group and the conventional learning in instruction using Flash? Research Question 3: Is there difference in instruction satisfaction according to the pattern of learning between the LT Cooperative Learning group and the conventional learning in instruction using Flash? The subjects of this study were 56 students at two classes of `Practical Computer(Ⅲ)` which is a compulsory cultural subject at P University, in 2007. The class utilizing LT Cooperative Learning was executed for 8 weeks from March to April, 2007.