The research is according to the quasi-experimental de ign. The goal is to analyze the environmental attitude and behavior of the role play by web based teaching. The research is to assess the achievement of wetland ecology, the environmental attitude of wetland ecology on student, the quantitative data of behavioral intention survey and assessment of web based learning environment attitude. Furthermore, there were teaching activities for four weeks to 2 classes, 64 students in all, at age of 10 in the same elementary school in Taipei county. The assessment include interview of the students and the record of watching in the classroom to discuss the role play of students in the wetland ecology web based teaching environment, the change of the behavioral intention and the environmental attitude after the experimental teaching. The following is the result of the research. 1. Corresponding to the teaching method of the role play of animation, better design of learning material for Wetland Ecology education to be promoted. 2. After experimental teaching, there are many differences between Experimental Group and Control Group. 3. After the analysis of environmental attitude of Wetland Ecology on students and the survey of behavioral intention, we know that those who receive the role play of Wetland Ecology web-based teaching, their environmental attitude and behavior are positive. 4. After the environmental attitude of web-based learning, the students did not meet any problems of using the web-based role play of Wetland Ecology teaching by themselves, so the learning affection of Wetland Ecology promotes the effectiveness.