The current positioning and industry advantages of foshan, one of the 9+2 cities in the guangdong-hong kong-macao greater bay area were summarized and analyzed. According to the development plan, industrial structure transformation and economic indicators of foshan, the demand of third-party testing industry is predicted. This paper analyzes the market position, development trend, number of existing enterprises and the distribution of the third-party testing industry by the country and guangdong province, and discusses the necessity of the third-party testing industry in the transformation stage of foshan's industrial structure.