In the 21st century, the rapid development of urbanization and industrialization in emerging economies, coupled with climate change and COVID-19, has led to a decline in the quality of drinking water, and the public’s demand for water purifiers has increased significantly. Water equipment. However, service personnel management is a difficult and complicated task for enterprises, and it is a major key factor in the smooth sales of products. The customer's professional knowledge, trust, interaction and risk perception of service personnel are the starting point for establishing a long-term relationship between the company and the customer, and it has the opportunity to make customer relationship management profitable in the long term. However, so far, many companies have rarely studied customer perception of service personnel as a research topic in customer relationship management.In addition, the existing research mostly takes the developed countries in the West as the analysis object. In contrast, this research selects Taiwan, which is a developing country, as the research object for analysis. This research constructs a research model based on social exchange theory, and collects valid samples of 159 consumers for structural equation analysis. Finally, this research discusses the empirical results, extracts practical implications, and proposes sales force management recommendations for the company.