Abstract:The function of science and technology museum determines its orientation, and directly affects its performance. Based on the essential attributes of museum, and focusing on the characteristics and needs to carry out science popularization, it is proposed that the education function is the core function of science and technology museum, the research and development of educational resources is the basic research function , and the radiation service function is an important part of the service function. The function of academic research and audience service is a strong guarantee for the exhibition education and innovative development of science and technology museum.Moreover, considering the differences between science and technology museums at different administrative levels in terms of their own capabilities, responsibilities and tasks, it is suggested that science and technology museums at national, provincial, prefectural and county levels should be equipped with corresponding functions to promote the overall strength of the national science and technology museum.The national science and technology museum and the provincial science and technology museum not only have the functions of education, research and development of exhibition and education resources, and audience service, but also have the function of radiation service, to play a guiding and leading role in the construction and development of the national and the provincial science and technology museum system respectively. The prefecture-level and the county-level science and technology museum should have the basic education and audience service functions, and can have the radiation service function, to provide science popularization services for the city and county museums and other institutions,respectively.