In recent years, mobile technologies have developed and applied in education fields, and some mobile emerging carriers with mobile technologies include a personal digital assistant (PDA), smart phone, and e-book. Some of the mobile carriers combines context-aware technologies or involve into wireless network environments to make effective use through the combination of learning scenarios and technologies, and then provide students new learning experiences differed from the past learning. In view of the application of mobile technology in education, some previous studies have addressed that mobile learning is a meaningful learning that can improve the interaction between students and the situations and reach the purposes of learning. In the main stream of mobile learning, using mobile carriers with suitable learning methods or strategies in mobile learning activities for different students to enhance learning have gradually become a important and concern issue. The purpose of this study is to investigate the learning achievement and learning attitude of elementary school students on a campus plant learning activity when they use mobile carriers and competitive learning strategies. The experimental results show that the competitive learning group of students have better learning performance than noncompetitive learning group of students. After completing the learning activity, the two groups of students presented high positive attitudes towards learning.