According to previous research findings, starting from the definition of science popularization industry, the common industry research method is applied, tentative survey of its classification and statistical system are conducted. There are two ideas for making the definition of science popularization industry. One is product statistical method; the other is industry statistical method. A comparative study between the two methods is carried out. They both contain pros and cons. However, two methods should be given full play for the advantages of each method and combine them with each other according to present statistics of science popularization industry.