In these years, the rise of the smart phone brings human more fast and more convenient way to transfer the information. Base on the function of communication, and take "LINE" as an example, using "the behavior of the users", "the satisfaction of the function", "the value of the conscious" and "interpersonal relationship" to discuss the effect of the people in the world today and the technology products. Some people are worry about using instant message application for a long time, it would deflect the interpersonal relationship. After the research, the negative impact of using the instant message application is not significant than we imagine.