To establish a house saving energy system, this text first analyses several net structures, and chooses power line as the correspondence medium, and also uses DTMF coding mode.

• 为了建立节能控制系统,本文首先分析了几种常见的住宅内的网络结构,从中选用了以电力线为通信介质的通讯网络,并介绍了一种基于DTMF编码方式的电力线通信系统。