Informal learning based on web2.0

80% of learning in organizations takes place informally outside of the formal classroom and e-learning courses, as indicated by the studies. Web2.0 software and technologies play an important role in supporting informal learning. There will be few technological troublesome if you choose a platform or framework provided by others. On the basis of introducing two forms of informal learning: personal learning environment and communities of practice, this paper explores strategies of implementing web2.0 informal learning, Finally, an example of communities of practice is present to illustrate how we can make use of it to support informal learning.