Abstract: A multi-point temperature measurement system based on wireless sensor network was designed for the hoggery's internal padding temperature measurement. Using STC89C52RC MCU as the core controller, C language as the programming language, complete acquisition nodes and a aggregation node's software and hardware design. Each acquisition node has three temperature sensors DS18B20 to measure the temperatures, using the nRF905 wireless modules to send data to the aggregation node. The aggregation node receive the data and display, it also have alarm function. The aggregation node's MCU use the serial port to communicate with the upper computer, and use VB 6.0 software programming to realize the real time display, storage alarm and data loading functions. Experiments show that the system has high practicability and reliability, and can be used for the other agricultural monitoring systems.