The purpose of smart grid is to construct new energy efficient services that measure and control residential electricity consumption in the real time. Nowadays, 6LoWPAN has emerged as a key network technology for Neighbor Area Network(NAN) and Home Area Network(HAN) in smart grid because it enables constrained smart meters to be globally connected to each other with low-power consumption. However, since those constrained smart meters operate on the low-data rate IEEE 802.15.4 mac protocol, the system for lightly measuring and controlling them should be required in smart grid. In this paper, we introduce a novel smart metering system for smart grid, which provides lightweight smart meter management mechanism using OMA lightweight M2M(LWM2M) standard and lightweight IPv6
communication using SNAIL: 6LoWPAN platform. In addition, by constructing web service for our system, anyone can easily analyze the electricity consumption for home appliances and control them with interoperability.