This paper mainly discusses the key technology of connecting wireless sensor network with M2M platform-design and implementation of M2M gateway. Wireless sensor network (WSN) has many advantages such as independent ad hoc network and low power consumption. However, because of its feature of short distance communication, its application scope is limited. It is an inevitable trend in the development of wireless sensor networks that connecting WSN to M2M platform, while M2M gateway is the key technology to achieve the docking. Wireless sensor network M2M gateway use the embedded ARM9 processor S3C2440 as the core; CC2530 as the sink node to collecting data of WSN; GPRS module EM310 as the export of network data to docking the M2M platform server. The M2M gateway, which can connect WSN with M2M platform, can be widely used in a lot of practical application of Internet of Things with strong universality.