Since the 1970s, foreign scholars have studied the clustering of producer services based on the mode of manufacturing industrial cluster, and thought that factors of production, demand conditions, system, environment and location choice were the main causes of agglomeration. With the wide use of information and communication technology and improvement of knowledge-intensive, producer services had a significant increase in the degree of integration of the whole industrial chain and industry-related effects as well as reduction of the requirement of geographic location. On the basis of traditional agglomeration mode, producer services emerged in a virtual, ecological and chain cluster agglomeration pattern. This paper reviews the domestic and foreign research on the cause, pattern and relation between cluster and diffusion of the producer service industries, and then gives some comments.