Abstract: Based on hyperspectral data of North China in 2004-2017, we calculate the total background field of CH₄, CO, O₃. They have obvious periodic characteristics on the time scale, which are mainly affected by temperature, humidity, high-altitude radiation, etc. On the spatial scale, the total amount of CH₄ and CO of plain is higher than that of the mountainous area, and O₃ generally shows the characteristics of decreasing with increasing latitude. It was found that 62.5% earthquake had a high value anomaly near the epicenter, the abnormal gases are mainly CH₄ and CO, and the O₃ anomaly is not obvious by summarization of earthquake cases of M_S5.0 earthquakes in North China on RST algorithm. It is considered that the abnormal extraction of hyperspectral gas CH₄ and CO by RST algorithm can be used as an auxiliary basis for earthquake prediction, and serve the earthquake tracking decision.