Advancement of information and communication technology changes recent paradigm of online education from desktop PC-based e-learning to smart phone or tablet PC-based u-learning. Being the state-of-the-art education environments where the interactions between educators and learners overcome the limitations of time and space, u-learning can be the very effective way for Korean language education. Especially, in addition to the offline learning, u-learning characterized by mobility, immanence, and instantaneousness provides optimal environments that maximize the learning effects of project-based learning. This paper proposes a model of project-based learning utilizing u-learning for Korean language education. This model is composed of five steps: 1) project preparation, 2) information gathering, 3) problem-solving via cooperative learning, 4) conclusions & presentation, 5) assessment & evaluation. Given a project topic titled ``Making a Korean learning dictionary for foreigners``, an teaching-learning guideline is introduced through suggesting the step-by-step activities of educators and learners. Focusing on the verb ``열다 [열ː다 jelːda]``, one of exemplary outcomes is also shown.