Abstract: This article proposes a new coal mine hidden hazard management and accident prevention system, which achieves a closed-loop management by establishing complete hidden hazard standard items as basic data, and provides a forecast and prevention function of the accident by combining with accidents analysis. Through the WCF layer, this system not only achieves linkage with other subsystems and also offers a mobile terminal application based on the Android platform. The industrial experiments show that it effecively improves discovery rate and rectification effect of hidden hazard, and reduces accident rates and casualty rates.