For the limitations of the traditional monitoring systems under the circumstances of dispersed monitoring points, wide distribution range and the harsh environment, a distributed wireless monitoring system based on radiofrequency technique is designed. The system adopts the ultralow power consumption MCU MSP430 as the main control chip and extends several processing module in the periphery. In addition, the multichannel transceiver nRF905 is used for wireless data transmission. The software and hardware design scheme of the proposed system and the communication protocol for distributed data transmission are discussed. Frequency hopping mechanisms are employed to increase the reliability of data transmission. The results show that the proposed system has the characteristics such as flexible use and excellent mobility, while can monitor multipoint data in special environment in realtime.