产业分类是研究国民经济结构的前提,是进行国民经济统计分析的基础。由于世界各国经济发展和文化、历史的差异,对产业分类的实际划分类别也不相同。为了使世界各国在产业分类中对各自经济活动部门有一个大致相同的划分标准,从而使产业分类统计资料在各国之间能进行对比分析,联合国统计委员会于1948年制订了一个《全部经济活动的国际标准产业分类》(ISIC),并于1958年、1968年、1984 Industrial classification is the premise of studying the structure of national economy and the basis of statistical analysis of national economy. Due to the differences in economic development, culture and history of all countries in the world, the actual classification of industries is not the same. In order to enable countries in the world to have a roughly equal division of their respective economic sectors in the industrial classification so that the disaggregated statistical data of industries can be compared across countries, the United Nations Statistical Commission formulated in 1948 an "all-economic International Standard Industrial Classification (ISIC), and in 1958, 1968, 1984