This paper proposes construction technology for a Smart Tap Home Energy Management System (HEMS) that can make the energy consumption of living environment information and the consumer electronics visible using Wireless Sensor Networks (ZigBee). This technology solves the problem of the introduction cost of the HEMS spread Also, HEMS can be easily constructed in homes or the offices without modifying it to fit an existing building or consumer electronics product at all. Moreover, using the features of the ZigBee telecommunication, the technology is described that can display and analyze a detailed breakdown of the amount of electric power an hour. We developed and evaluated the proposed prototype Smart Tap HEMS for Indication. As a result, we found out how much electricity is wasted and shared the energy-saving strategy in our laboratory.