Due to the thrive of mobile network and portable device, distance learning is evolved from desktop computer to mobile device. Mobile Learning is the use of mobile or wireless devices for learning while the learner is on the move. In this study, the strengths of mobile learning supported by industrial and academic projects are elaborated. These also mark the current status of mobile learning. On the basis of the characteristic and scenario of current mobile learning, challenging issues from the perspective of cognitive learning are addressed to reflect the fundamental needs for effective mobile learning. These addressed issues serve as the initiation for the needs of academic evaluation and solid theoretic framework for the implementation of mobile learning from the view of cognitive science, instead of technological evolution.