The invention discloses an intelligent and dynamic monitoring system for mine grouting and a working method thereof. The system comprises grouting pipes, a ball valve, a grout recovery pump, a high-precision intrinsic safety type pressure sensor, a high-precision intrinsic safety type flow sensor, a grouting anchor rod positioning system, a grouting anchor rod, a stirring device, a mining area grout pump station, a data transmission system, a ground data acquisition system and a coal mine dispatching center, wherein a plurality of grouting connectors are arranged on the periphery of the miningarea grout pump station, and the grouting pipes are arranged on the sides, deviating from the mining area grout pump station, of the grouting connectors separately. Through interaction of the ball valve, the high-precision intrinsic safety type pressure sensor, the high-precision intrinsic safety type flow sensor, the grouting anchor rod positioning system, the grouting anchor rod and a ground data acquisition system, grouting parameters are accurately collected in the grouting process, the grouting effect is detected in real time, and the grouting anchor rod which does not reach the standardcan be timely repaired.