Consumers' purchase decisions can be influenced by others' opinions, and others' actions. Recent advances in technology have significantly increased the importance of consumer social interactions as a market force. Also information technologies are creating increasing opportunities for firms to facilitate these two types of social interactions. This paper discussed the management of consumer social interactions based on the internet. First, the two types of consumer social interaction were introduced. Then, when and how the seller should adjust its management strategies in response to the two types of consumer social interactions were thought. At last, some management strategies were put forward based on the existing literatures. We find that the seller should pay more attention to consumer social interactions in the period of product production. Providing the existing consumers' observational learning information on their website can benefit the sellers. When deciding whether to provide the platform for consumers to post their product reviews on the seller's website, the seller need to consider the relative size of expert and novice segments. Furthermore, the enterprise should distinguish customers' ranks for their different influence. To different product and marketing conditions, the management strategies should be different. In addition, the third-party reviews, as an important form of word of mouth, can benefit the sellers if they respond to them correctly. In general, we hope that such a study can help an enterprise in its decision making.