本文描述了一种无线传感器网络节点的硬件平台组成，分别对负责无线收发功能实现的射频芯片、负责数据采集的传感器模块、负责整体上工作的微处理器进行了描述，对和CC2420与EM78815微处理器的硬件接口进行了设计；然后介绍了本无线传感器网络系统整体软件体系结构与设计，主要包括软件总体架构、硬件驱动层设计和操作系统层设计。-This paper describes a wireless sensor network node hardware platform, namely, in charge of wireless RF transceiver chip functions, is responsible for sensor data acquisition module, responsible for the overall work of the microprocessor are described on and CC2420 with EM78815 microprocessor hardware interface design　and then introduction of the wireless sensor network system as a whole software architecture and design, including the overall structure of software, hardware driver layer design and the design of the operating system layer.