Wireless sensor networks(WSNs) which develop steadily and fast became the most popular technology at the beginning of the 21st century and would have a good influence on the world for a long time, but at present most of the study are mostly focus on the theory of algorithm for network topology, routing, location etc., however the real world needs real devices, and at the same time the device must meet the needs of practical applications, so, according to the various structural features of the wireless sensor networks, a new design with ZigBee protocol based on the System-on-Chip (SoC) chip of CC2430 for wireless sensor nodes is proposed. We emphasize the circuit design and the process of system initialization, we use the humidity and temperature sensor SHT10 to meet the low-power cost of the system. Finally, we tests the compact design of the node with SHT10, which has an excellent performance and stable operation with good extendibility.