The structure of modern buildings is complex and high-rise, and the wireless sensor network(WSN) for centralized monitoring of the buildings must have a large network capacity, and there is certain difficulty in wireless communication link security under the complex multi obstacles environment. Designed a wireless sensor network model integrating Zigbee technology and 433 MHz radio communication technology, in which Zigbee network using the Z-STACK protocol and CC2530 Zigbee module of TI company and the 433 MHz radio communication module using RFM69H. The test results show that this WSN can cover a building area of a radius of 600 m, the packet loss rate is less than 5% and promises a good network service quality(Qos). The network communication is at ISM band with low cost, and the WSN has a good application prospect.