Technology which develops rapidly is changing the way of communication. The Information Era which seizes every minute and every second makes the value of communication become more and more obvious. Based on the summary of domestic and foreign research on internet communication and SNS, this paper indicated that the value of communication is ‘communication ability’ and then used four indicators to do the empirical analysis of the communication behaviors of users of kaixin001.com. At last, this paper came up with the model of communication ability of SNS and the system of two-level indicators to evaluate communication ability, and also proposed three strategies to increase communication ability.