The aim of present study was two-fold: (1) to determine university students' familiarity and understandings of 'sustainable development', (2) to examine their attitudes toward sustainable development, environmental values, and their behaviors toward sustainable life styles. The data collected by on-line administration of a questionnaire to 958 university students during February-June of 2008 were analyzed by using descriptive statistics. The results reflected that majority of the participants declared themselves familiar with the term of sustainable development, but they could not develop a sound understanding as a holistic concept. It was also found that university students had favorable attitudes toward sustainable development and intrinsic values toward the environment. However, these participants did not readily take some radical actions in order to create a more sustainable future.