This study is to investigate the impact of ‘u-classroom’(a classroom enhanced by ubiquitous computing technology) on teaching and learning practices. Currently, ‘u-classroom’ projects are being done by MOE and Provincial Educational Bureau, which purposes are to understand the future classroom and to develop the prototype of technology-enhanced classroom environments. Up to now, many studies focus on the satisfaction degree and academic achievement, but researchers hardly inquire the actual process of teaching and learning in the classroom and what is really going on in this ‘adventurous’ classrooms. This study compares the ‘u-classroom’ with traditional classrooms in terms of teaching practices, learning process, classroom's social and psychological environment, and students' self-directed learning. The survey method was used to collect data from students in six classrooms(3 u-classrooms, 3 traditional classrooms). The T-test was used to identify the statistical significance of the differences. The results show that the teaching practices and learning processes of u-classroom were more constructivist than traditional classrooms, but students' learning skills and SDL were not meaningful compared to those of the traditional classrooms. The issues and implications of the results were also discussed.