Abstract: Guangzhou is the central city of one of the developed regions, Pearl River Delta (PRD), in China. The level of producer services in Guangzhou is better than most of the other cities in China. To study the characteristics of the external function of the producer services in this central city will be helpful to understand the current level of producer services in China. According to the literature review, a conclusion was drawn that producer services have the function of the basic activities. After analyzing the statistical data, this paper proves that the producer services of Guangzhou have the same function. In order to find out the characteristics of the external function at present, a face-to-face survey to the producer services organizations that located in Guangzhou was done. The spatial scale of the market, the type of the clients and the distribution of the services are focused in the survey. There are five findings. ①Though the share is low, PRD is the biggest part in the external market of the producer services of Guangzhou. ②The share of external market declining with the distance, means that the farther away from Guangzhou, the lower the market share of the producer services from Guangzhou. ③The clients involve the primary industry, the secondary industry and the tertiary industry, and the tertiary industry consumes the most part of the producer services. ④There is gap between the share of the distribution of the clients and the services, which means that in one market area, the market share for the clients is different to that for the producer services. It shows that the insufficiency of the market exploration by the producer services organization in Guangzhou, though the spatial scale of the external market of it is extensive. ⑤PRD and Guangdong Province, the two nearest markets to Guangzhou, will be the most dominating areas for the producer services organization of Guangzhou to exploit in the coming three years. And another survey to the manufacture companies in PRD was done. The findings explain why the effect of the producer services in Guangzhou is so limited to the manufacture in the PRD currently.