Science & technology museums are the main venues for juveniles to accept informal education. Educational activities that are held at museums are one of the methods to improve the scientific literacy of juveniles and citizens which should follow a scientific idea，spirit and method. This paper takes the case of “Science & Technology Museums into Campuses” as the implementation of “Suggestion on Further Strengthening and Improving the Construction and Management of Out-of-school Venues for Juveniles Promulgated by General Office of the State Council and General Office of the Central Committee of the Communist Party” and “Outline of National Action Plan on Scientific Literacy for All Chinese Citizens（2006-2010-2020），” to summarize the status quo，the effective method，and the mechanism to combine both school education and out-of-school education. Based on several years of practices and explorations，the capabilities of instructors to organize activities at science & technology museums have been largely improved，therefore a great number of scientific education resources have been accumulated to promote the development of whole industry. However，there are still some problems and challenges，for example，the cooperation between science & technology museums and schools needs to be strengthened in depth and breadth；the activities conducted by scientific instructors need to be more targeted and adaptable；there is a lack of qualified out-of-school teaching staff；the follow-up assessments are inadequate；and the demonstration and popularization of quality educational activities and resources are insufficient.