MOOCs is a kind of network learning style and has a quite impact on college English teachers, especially for the development of teachers themselves. In the perspective of MOOCs, harmonious ecological niches mean that factors tend to the open type. People can learn the world famous universities’ course video after the development of MOOCs. As modern college English teacher, we must change ideas, perceive MOOCs and constantly update the knowledge. We should create new knowledge and improve the level of information. Ecological factors in foreign language teaching system also have the potential to expand its niches, and each factor tries to occupy a larger space for survival and development .The process of the development of the ecological factors is the concrete embodiment of niches expansion. In the vision of MOOCs if teachers most important factors can continuously improve their skills, intelligences and emotional abilities via exchanging energy and then its ecological niches will gradually expansion.