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A wireless outdoor environment monitoring system that uses solar power mode is designed. The system consists of terminal nodes, ZigBee-GSM gateway and PC data storage center. It integrates ZigBee and GSM wireless communication technology. It can control the on-off of terminal node data acquisition, and be requested the important information of the outdoor environment remotely according to SMS command. Based on the traits of outdoor environment factors, the concentration of PM2.5 and ultraviolet index of different locations of outdoor areas are measured by the use of sensors of industrial-grade and high sensitivity. The measured results can be not only displayed and stored in the upper machine in real-time, but also it can be sent to the mobile terminal by SIM900A module of ZigBee-GSM gateway. The outdoor test results show that the system can run stably, data transmission is reliable, and it can realize the remote telemetry function fast. It provides a technical means for the remote monitoring of outdoor environment.