Abstract: FY-2 satellite is a geosynchronous meteorological satellite which is produced and lunched by China. The satellite carries the spatial particle detector and the solar X-ray detector used for detection of solar proton-event in high energy particle environment. The whole data receiving and alerting system of FY-2 consists of three systems: the earth-based system of data receiving and demodulating, the system of data processing and alerting. At first, environment detection data are collected, modulated and transmitted in the onboard system of FY-2 and detectors. Then data signals are magnified, demodulated and sent into the earth-based system of data receiving and demodulating. At last, data is received, processed, stored, displayed and judged to make alarm automatically by telephone for solar proton-events and X-ray flare in the system of data processing and alerting. It is an important way for guaranteeing space vehicle’s safety and enhancing antiradiation’s level.