Abstract
We had been trying to inspect how promoting the use of Computer-Mediated Communication (CMC) has effect on writing and colloquial expressions, human relations and Quality of Life (QOL). And we examined the causality among those factors including the effect of reading good books by Covariance Structure Analysis. As a result, i shows there was an improvement of writing and colloquial expressions only by reading good books and there was no relation between the use of E-mail and Social Networking Service (SNS) and an improvement of writing and colloquial expressions. From now on it indicates, ″reading of good books″ should be encouraged in this information environment.