Abstract: In the event of a nuclear emergency, it is crucial to quickly assess the radiation levels within the nuclear power plant site. To address the issue of the rapid changes in the radiation field after a nuclear accident and the potential failure of the fixed monitoring network, this study has developed a low-power gamma radiation detection module based on LoRa. The system employs a dual-probe detector with scintillation and semiconductor sensors. Through both hardware and software low-power designs, it achieves wide-range, low-power long-term continuous monitoring. Utilizing the self-organizing network technology of the LoRa module, it supports rapid multi-point deployment and long-distance wireless transmission. Test results indicate that the module operates stably in complex environments, with low power consumption and reliable data. It meets the needs for rapid response in nuclear emergencies and wide-area radiation monitoring, and has good prospects for engineering applications.